Saving memory on android

Saving Files

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Android uses a file system that’s similar to disk-based file systems on other platforms. This lesson describes how to work with the Android file system to read and write files with the File APIs.

A File object is suited to reading or writing large amounts of data in start-to-finish order without skipping around. For example, it’s good for image files or anything exchanged over a network.

This lesson shows how to perform basic file-related tasks in your app. The lesson assumes that you are familiar with the basics of the Linux file system and the standard file input/output APIs in java.io .

Choose Internal or External Storage

All Android devices have two file storage areas: «internal» and «external» storage. These names come from the early days of Android, when most devices offered built-in non-volatile memory (internal storage), plus a removable storage medium such as a micro SD card (external storage). Some devices divide the permanent storage space into «internal» and «external» partitions, so even without a removable storage medium, there are always two storage spaces and the API behavior is the same whether the external storage is removable or not. The following lists summarize the facts about each storage space.

• It’s always available.
• Files saved here are accessible by only your app by default.
• When the user uninstalls your app, the system removes all your app’s files from internal storage.

Internal storage is best when you want to be sure that neither the user nor other apps can access your files.

• It’s not always available, because the user can mount the external storage as USB storage and in some cases remove it from the device.
• It’s world-readable, so files saved here may be read outside of your control.
• When the user uninstalls your app, the system removes your app’s files from here only if you save them in the directory from getExternalFilesDir() .

External storage is the best place for files that don’t require access restrictions and for files that you want to share with other apps or allow the user to access with a computer.

Tip: Although apps are installed onto the internal storage by default, you can specify the android:installLocation attribute in your manifest so your app may be installed on external storage. Users appreciate this option when the APK size is very large and they have an external storage space that’s larger than the internal storage. For more information, see App Install Location.

Obtain Permissions for External Storage

To write to the external storage, you must request the WRITE_EXTERNAL_STORAGE permission in your manifest file:

Caution: Currently, all apps have the ability to read the external storage without a special permission. However, this will change in a future release. If your app needs to read the external storage (but not write to it), then you will need to declare the READ_EXTERNAL_STORAGE permission. To ensure that your app continues to work as expected, you should declare this permission now, before the change takes effect.

However, if your app uses the WRITE_EXTERNAL_STORAGE permission, then it implicitly has permission to read the external storage as well.

You don’t need any permissions to save files on the internal storage. Your application always has permission to read and write files in its internal storage directory.

Save a File on Internal Storage

When saving a file to internal storage, you can acquire the appropriate directory as a File by calling one of two methods:

getFilesDir() Returns a File representing an internal directory for your app. getCacheDir() Returns a File representing an internal directory for your app’s temporary cache files. Be sure to delete each file once it is no longer needed and implement a reasonable size limit for the amount of memory you use at any given time, such as 1MB. If the system begins running low on storage, it may delete your cache files without warning.

To create a new file in one of these directories, you can use the File() constructor, passing the File provided by one of the above methods that specifies your internal storage directory. For example:

Alternatively, you can call openFileOutput() to get a FileOutputStream that writes to a file in your internal directory. For example, here’s how to write some text to a file:

Or, if you need to cache some files, you should instead use createTempFile() . For example, the following method extracts the file name from a URL and creates a file with that name in your app’s internal cache directory:

Note: Your app’s internal storage directory is specified by your app’s package name in a special location of the Android file system. Technically, another app can read your internal files if you set the file mode to be readable. However, the other app would also need to know your app package name and file names. Other apps cannot browse your internal directories and do not have read or write access unless you explicitly set the files to be readable or writable. So as long as you use MODE_PRIVATE for your files on the internal storage, they are never accessible to other apps.

Save a File on External Storage

Because the external storage may be unavailable—such as when the user has mounted the storage to a PC or has removed the SD card that provides the external storage—you should always verify that the volume is available before accessing it. You can query the external storage state by calling getExternalStorageState() . If the returned state is equal to MEDIA_MOUNTED , then you can read and write your files. For example, the following methods are useful to determine the storage availability:

Although the external storage is modifiable by the user and other apps, there are two categories of files you might save here:

Public files Files that should be freely available to other apps and to the user. When the user uninstalls your app, these files should remain available to the user.

For example, photos captured by your app or other downloaded files.

Private files Files that rightfully belong to your app and should be deleted when the user uninstalls your app. Although these files are technically accessible by the user and other apps because they are on the external storage, they are files that realistically don’t provide value to the user outside your app. When the user uninstalls your app, the system deletes all files in your app’s external private directory.

For example, additional resources downloaded by your app or temporary media files.

If you want to save public files on the external storage, use the getExternalStoragePublicDirectory() method to get a File representing the appropriate directory on the external storage. The method takes an argument specifying the type of file you want to save so that they can be logically organized with other public files, such as DIRECTORY_MUSIC or DIRECTORY_PICTURES . For example:

If you want to save files that are private to your app, you can acquire the appropriate directory by calling getExternalFilesDir() and passing it a name indicating the type of directory you’d like. Each directory created this way is added to a parent directory that encapsulates all your app’s external storage files, which the system deletes when the user uninstalls your app.

For example, here’s a method you can use to create a directory for an individual photo album:

If none of the pre-defined sub-directory names suit your files, you can instead call getExternalFilesDir() and pass null . This returns the root directory for your app’s private directory on the external storage.

Remember that getExternalFilesDir() creates a directory inside a directory that is deleted when the user uninstalls your app. If the files you’re saving should remain available after the user uninstalls your app—such as when your app is a camera and the user will want to keep the photos—you should instead use getExternalStoragePublicDirectory() .

Regardless of whether you use getExternalStoragePublicDirectory() for files that are shared or getExternalFilesDir() for files that are private to your app, it’s important that you use directory names provided by API constants like DIRECTORY_PICTURES . These directory names ensure that the files are treated properly by the system. For instance, files saved in DIRECTORY_RINGTONES are categorized by the system media scanner as ringtones instead of music.

Query Free Space

If you know ahead of time how much data you’re saving, you can find out whether sufficient space is available without causing an IOException by calling getFreeSpace() or getTotalSpace() . These methods provide the current available space and the total space in the storage volume, respectively. This information is also useful to avoid filling the storage volume above a certain threshold.

However, the system does not guarantee that you can write as many bytes as are indicated by getFreeSpace() . If the number returned is a few MB more than the size of the data you want to save, or if the file system is less than 90% full, then it’s probably safe to proceed. Otherwise, you probably shouldn’t write to storage.

Note: You aren’t required to check the amount of available space before you save your file. You can instead try writing the file right away, then catch an IOException if one occurs. You may need to do this if you don’t know exactly how much space you need. For example, if you change the file’s encoding before you save it by converting a PNG image to JPEG, you won’t know the file’s size beforehand.

Delete a File

You should always delete files that you no longer need. The most straightforward way to delete a file is to have the opened file reference call delete() on itself.

If the file is saved on internal storage, you can also ask the Context to locate and delete a file by calling deleteFile() :

Note: When the user uninstalls your app, the Android system deletes the following:

• All files you saved on internal storage
• All files you saved on external storage using getExternalFilesDir() .

However, you should manually delete all cached files created with getCacheDir() on a regular basis and also regularly delete other files you no longer need.

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5 Ways | How to Increase Phone Memory to Fix Insufficient Storage Error

What should you when Android phone shows with «Insufficient Storage Available» or has limited space available? Follow these solutions to increase phone memory.

How to Increase Phone Memory of Android Phone in 5 Ways

Workable Solutions	Step-by-step Troubleshooting
Fix 1. Delete Useless Apps	Go to «Settings» > Tab «Apps» > Choose useless apps or unwanted apps and select «Uninstall». Full steps
Fix 2. Transfer Data to Cloud	If you have a Cloud account such as Google Drive or Dropbox for your Android phone. Full steps
Fix 3. Expand Android Storage Space	Connect a USB flash drive or a memory card reader to the end of the adapter. Full steps
Fix 4. Use Terminal Emulator	Partition your SD card with EaseUS Partition Master. Check how to make it at the end of this article. Full steps
Fix 5. Run GOM Saver	Download the GOM Saver app from the Google Play Store. Full steps

How Do I Increase My Android Phone’s Internal Storage

«Yesterday, when I tried to install a new app on my Android phone, I received a warning message — insufficient storage available. My phone has 4GB of internal storage, and it seems not enough for today’s high-quality data. How to increase phone memoryВ of Android phone because I have no plans to change my phone for the time being.”

As we all know,В there are many Android phones are facingВ lowВ internal memory issueВ when installing games and apps.В This problem is especially serious in budgetВ phones because most of these phones have littleВ memory; for example, some Android phones only have 4G memory.

If you are running insufficient storage space on your Android phone, you can expand and increase internalВ memory through several different methods.В Here in this article, you’ll findВ sixВ effective methods toВ fix the «not enough storage available» error and increase internal storage space on AndroidВ phones.В

Fix 1. DeleteВ Apps, Clean History to Increase Internal Memory

Sometimes, Android apps will take up quite a lotВ of space in Android phones with browsing history and caches. As time goes by, every app on the users’ phone will be filled with cached files. Therefore, cleaning up useless apps, history, or caches will surely save more useful space and extend Android internal memory.

1. Delete unwanted apps on Android

Go to «Settings» > TabВ «Apps» > Choose useless apps or unwanted apps and select «Uninstall» or «Clear Data».

2. Clean up app history or caches to increase phone memory

Go to «Settings» > «Storage» > ClickВ «Cached data» > You’ll receive a message showing «This will clear cached data for all apps», click «OK».

Fix 2.В Transfer Data to Cloud Storage or PC to ExtendВ Storage

If you have a Cloud account such as Google Drive or Dropbox for your Android phone, it will be a good way to save Android phone storage space by transferring data to Cloud storage. Wonderful photos, videos, or other files can be upload to Cloud so to save more free space on Android.

If you don’t have a Cloud account, you may choose a PC or tablet or other external storage devices to save internal memory on the Android phone. You can try to export rarely used data to a PC and delete them on your phone.

If you don’t want to move your Android data or files out and save in Cloud or PC, you can also try to add memory to increase internal memory on Android with USB OTG. Detailed steps will be listed in Fix 4.

Fix 3. Expand Android Storage Space with USB OTG

USB On-The-Go (USB OTG or OTG) allows USB devices such as tablets or smartphones to act as hosts and allows other USB devices (such as USB flash drives, digital cameras, mice, or keyboards) to connect to them.В So you can connect a peripheral such as a USB storage device to your Android phone and add more space to it.

USB OTG will help you to increase Android internal storage space by adding an external hard drive or USB drive to the phone with an OTG adapter. If you don’t know whether your phone supports USB OTG or not, you can download the USB OTG Checker app to test.

See how to increase internal storage space on Android phones by using USB OTG.

Step 1. Connect a USB flash drive or a memory cardВ reader to the end of the adapter.В Then,В connect the OTG cable to the Android phone.В

Step 2. The file manager will automatically appear. If not, swipe down from the top to show the notification bar.

Step 3. Tap USB Drive.В Now, you can transfer files from your Android phoneВ to the connected USB flash drive or memory card.

Go to «Internal Storage» > select the file you’d like to move. Tap the three dots buttonВ and select «Copy».В Then, navigate to the USB driveВ andВ tap «Done» to complete the process.

Fix 4. Use Terminal Emulator/INT2EXT/Mounts2SD Apps

In addition to Link2SD, other known apps such as Terminal Emulator, INT2EXT, or Mounts2SD can also help to add SD card space to an Android phone, so to increase Android internal memory with ease. You may selectively try any one of these apps and apply them to increase your Android internal storage space then.

Let’s talk briefly about how to use Terminal Emulator to borrow free space from the memory card to increase the internal storage space of Android.

Preparations:

• Higher class micro SD card(class 4 or higher)
• Install Terminal Emulator app to your Android phone

Step 1. Partition your SD card with EaseUS Partition Master. Check how to make it at the end of this article.

Step 2. Download and install Terminal Emulator App on your Android phone. Launch the app.

Step 3. Type suВ and tab enter. Type a2sd xdataВ and tab Enter. When you input these commands, the app will ask you whether to continue with the process or not. Here, type y and press Enter.

Step 4. Now, Type yВ to reboot your device as required.

Step 5. In this way, you have successfully increased internal storage space on Android. You can go to Menu > Settings > Storage to check it.

If you want to undo the process and revert the phone back to the way it was before, type suВ > a2sd noxdataВ >y.В Press Enter after typing each command.

Fix 5. Install and Run GOM Saver to Increase Storage Space on Android

You can use GOM SaverВ to compress your photos and videos. The average saving is about 50% of the original file amount. You can also clear some space in this way and increase storage on Android.В В

Step 1. Download the GOM Saver app from the Google Play Store.

Step 2. Launch GOM Saver,В and enter the main screen. You can see how much memory you can save by running the video or image compression.

Step 3. You can delete the original file or cloud back it up.В

Step 4. If you choose to compress the images or videos, the compressed filesВ will be left on your phone.

More Quick CodesВ to IncreaseВ PhoneВ Memory on Android

Except for using theВ solutions above to fix the «Insufficient storage available»В error, you can also try the following simple tips to increase internal storage on Android.

• Disable bloatware
• Delete photos and videos
• Temporarily disabling apps
• Remove unwanted downloads

Additional Help — How to Partition/Initialize an SD Card

Adding a memory card into an Android phone will surely help to expand internal space.В Usually, the SD card you insert will be initialized and partitioned by the phone itself.В If your SD card really cannot be initialized or partitioned, you can try EaseUS partition software — EaseUS Partition Master. This disk management software can resize, format, and increase space on your hard drive, SD card, and USB flash drive.

Your Reliable Choice — EaseUS Partition Master

• Transfer free disk space from one drive to another directly.
• Resize/move, merge, clone partition, and check file system error.
• Clone disk, convert to MBR/GPT, convert to dynamic/basic, and even wipe data.
• Migrate OS, increase partition space, and more

оћѓ ChristmasВ Sale,В hugeВ discount

Connect your SD card to the PC, and follow the steps below. This is an example of initializingВ a hard drive or SSD:

Step 1. Open EaseUS Partition Master. Connect the hard drive or SSD to PC.

Right-click the target HDD or SSD and select «Initialize to MBR» or «Initialize to GPT» accordingly.

Step 2.В A pending operation of initializing disk to MBR or GPT disk will be added. Execute the operation and click «Apply».

0:00-0:22 Initialize to MBR; 0:23-0:49 Initialize to GPT;

Then if you cannot initialize your SD card with EaseUS Partition Master, it means that the SD card has a physical problem. You can repair your SD card with anВ SD card repair tool.

Conclusions

This post covers the most useful approaches to increase internal storage space on Android phones. The best way to increase Android’s internal storage is to borrow it from the SD card with the help of the Link2SD app. If you are going to adopt this method, note the following tips:

• Back up your memory card contents before in advance
• Have a charged phone to avoid any disruptions
• You must root your phone before transferring data to an SD cardВ

For any further problems, you can turn to our technical support team for help via live chat.В

Codes to Increase Phone Memory FAQs

If you still have questions, you can read the questions and answers below to get additional help.

How can I increase my phone’s internal memory?

• Disable bloatware
• Delete photos and videos
• Temporarily disabling apps
• Remove unwanted downloads
• Delete Useless Apps
• Transfer Data to Cloud.

How can I increase my phone speed?

Tips To Increase Android’s Performance

• Update your Android
• Remove Unwanted Apps
• Disable Unnecessary Apps
• Update Apps
• Use High-Speed Memory Card
• Keep Fewer Widgets.

Why is the phone slow?

If your Android is running slow, chances are the issue can be quickly fixed by clearing out excess data stored in your phone’s cache and deleting any unused apps. A slow Android phone may require a system update to get it back up to speed, although older phones may not be able to run the latest software properly.

Why is my phone slow and freezes?

There are several reasons why an iPhone, Android, or another smartphone might freeze. The culprit may be a slow processor, insufficient memory, or a lack of storage space.В

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