Modern smartphones and tablets are used to store and process information no less frequently than computers. Accordingly, the problem of accidental data loss is no less relevant here: valuable photographs, videos, important documents - sometimes the loss is irreplaceable.
Just like when recovering lost data on a computer, the key to successfully recovering deleted files on Android is to exclude further writing to the media. Simply put, as soon as you discover that the files you need have been erased, you need to immediately remove the memory card or completely turn off your smartphone. These precautions help prevent memory cells from being overwritten.
Using a computer
The easiest way to recover files deleted on an Android device is from your computer. They will help you do this special programs type Recuva or 7-Data Android Recovery. But to take advantage of their capabilities, you first need to enable USB debugging on your phone or tablet - this is necessary so that the device is detected in the system as removable drive.
Enable debugging:
If there is no "For Developers" section, follow these steps:
- Open Settings.
- Scroll down the menu to the About Phone section.
- Find the item “Build number” and tap on it 7 times. As you click, a notification will appear telling you how many more times you need to click to become a developer.
After enabling debugging, the smartphone connected to the computer will be detected as an external drive from which almost any deleted data can be recovered.
7-Data Android Recovery
7-Data Android Recovery, like Recuva, works without root rights, restoring files deleted from storage media. The only unpleasant thing is that you have to pay to use the 7-Data software.
Save the found data to your computer, not to your phone's memory. When the recovery is complete, simply transfer the files to your smartphone.
Recuva
The Recuva utility allows you to recover data from any media, incl. With microSD cards And internal memory smartphone. The procedure is no different from the recovery algorithm via 7-Data Android Recovery:
After scanning, you will receive a report of the data found that can be recovered. Next to each file there is a circle, the color of which you need to pay attention to:
- Green – information can be restored without problems.
- Yellow – file may be damaged.
- Red – data cannot be returned.
All you have to do is select the files and click “Recover” to get back the lost information. 
The EaseUS Mobisaver and Undelete for Root Users programs work in a similar way, but they require root access to work, so it is better to first try to solve the problem using Recuva and 7-Data.
Using Applications
If it is not possible to recover files on Android via a PC, you will have to resort to help special applications. The main disadvantage of this method is the need to obtain root rights - without them, the application will not gain access to memory.
As an example, let's look at the Undeleter program, which can recover files from an external flash card and internal memory. Sorry, no purchase full version Only the image return function is available, but if you are satisfied with the application, then a small financial investment should not be a problem. 
The application interface is friendly to novice users. You need to specify the folder in which the deleted data was stored, after which the memory scan will start. As a result, the program will issue a full report containing files that can be recovered from the phone.
It is often easier to prevent a problem than to deal with the consequences later. Removal important information is definitely one of those unpleasant situations that is best avoided. That's why:
Let's take the Dumpster application as an example. After installing it, you specify what types of files are sent to the Trash and how long they will be stored there. If necessary, you do the same as with the Recycle Bin on your computer - empty it or restore accidentally deleted files.
Recuva is a very useful application that can help you recover files and folders that have been permanently deleted.
If you accidentally formatted a flash drive, or you needed deleted files after emptying the recycle bin, do not despair - Recuva will help you return everything to its place. The program has high functionality and ease of searching for missing data. Let's figure out how to use this program.
1. The first step is to go to the developer’s website and download the program. You can choose both free and commercial versions. To recover data from a flash drive, a free one will be enough.
2. Install the program following the installer's prompts.
3. Open the program and start using it.
How to recover deleted files using Recuva
When launched, Recuva gives the user the ability to configure search options for the required data.
1. In the first window, select the data type, also known as the format - images, videos, music, archives, Email, Word documents and Excel or files of all types at once. Click on “Next”
2. In the next window, you can select the location of the files - on a memory card or other removable media, in documents, the trash can, or a specific location on the disk. If you don't know where to look for the file, select "I'm not sure."
3. Recuva is now ready to search. Before starting it, you can activate the advanced search function, but this will take more time. It is recommended to use this function in cases where the search did not produce results. Click “Start”.
4. Before us is a list of found data. A green circle next to the name means that the file is ready to be restored, a yellow circle means that the file is damaged, and a red circle means that the file cannot be restored. Place a check mark next to it the desired file and click “Recover”.
5. Select the folder on your hard drive where you want to save the data.
how to recover deleted files? Android and what to do if the recuva program does not see the phone? and got the best answer
Answer from Dmitry[guru]
Titanium Backup PRO- link
Titanium Backup is the only one of its kind, the most intelligent and powerful program for saving and restoring application data on Android OS. Working with the program significantly saves time in many cases. For example, if you lose important data after formatting system partition, after flashing your animal, etc. Using the program does not cause any difficulties thanks to the intuitive clear interface and support for the Russian language.
If you need to create backup copy all available on your Android phone or tablet applications, including system programs, save everything WiFi settings And mobile networks and then restore your phone or tablet to the initial state, no program will cope with this task better than Titanium Backup.
Platform: android 1.5+
Interface languages: Russian and others
Answer from Hetman Software[guru]
Try Hetman Partition Recovery: link
The program recovers data from hard drives and any other storage media managed by FAT, NTFS file systems, regardless of the reason for their loss. Including after formatting.
Answer from 3 answers[guru]
Hello! Here is a selection of topics with answers to your question: how to recover deleted files? Android and what to do if the recuva program does not see the phone?
Surely every user has at least once encountered a situation when unnecessary file was deleted permanently, and later turned out to be necessary, or was erased accidentally - for example, during a system failure. What to do in such cases? One of the simplest and most accessible tools for recovering previously deleted files is Recuva program, which is very easy to use.
Recuva - what is the program and what is it for?
Recuva is a program for restoring permanently erased files from the British software developer Piriform, known to Russian users for the CCleaner and Defraggler utilities. It is produced in three versions:
- Standart - designed to work on PCs, laptops, netbooks and all-in-one computers;
- Portable - does not require installation on a computer, as it is used to work with removable storage media.
- Professional - version with automatic updates, designed for in-depth recovery of damaged or lost files on PCs and virtual disks.
There are many resources on the RuNet from which this program can be easily downloaded, but boot files products offered by them may well contain viruses, so in the absence of a reliable antivirus program, it is better to download Recuva from the “native” siteStandard and Portable are available for download for free. The Professional version costs 800 rubles. It is also sold as a set of four professional versions of the company’s products: , Defragler, Speccy and Recuva for 1,190 rubles.
Advantages and disadvantages
According to numerous ratings from ordinary users and professional magazines, this program has been the leader among utilities for recovering deleted files for several years now. However, like any program, it has its advantages and disadvantages.
The advantages of the product include:
- Russified, intuitive interface;
- availability of a fully functioning free version;
- interaction with any types of information storage devices - from hard drives to memory cards;
- the ability to manually select places to search for lost files;
- search for system and hidden files;
- the ability to restore the structure of previously erased folders and archives;
- work with most of the most common formats, types and types of information: text documents, tables, presentations, photographic materials, audio and video files, folders, archives, etc.;
- the ability to manually set the degree of depth for file recovery and the level of reliability of information deletion.
The disadvantages of the product include:
- duration of work - from several hours even with a simplified search;
- the ability to restore only those files whose condition was rated as excellent after data search - if their quality is average or worse, then they cannot be restored.
In practice, the vast majority of files do not lose their quality when deleted The program can restore different types files, but only if they are erased in a standard way, when moving and then emptying the Recycle Bin or formatting the disk. If you previously used any other utility to permanently delete files, then Recuva will not be able to restore them.
How to use the program - features and functions
Recuva is a utility that every technology user will need at least once, since no one is immune from accidental file deletion or system failures. How to work with this program?
Installation
Interface and Features Overview
After launch, the program will automatically prompt you to select the type of files that need to be recovered. To improve the quality of your search, it is recommended to check the in-depth analysis box.
How better program will analyze the disk, the more deleted files it will find Upon completion of the search, the program will display a list of files that have been erased but can still be restored. The color of the circles next to the file name indicates the likelihood of success. Green ones have the maximum chances, red ones have the minimum ones.
Most files, as a rule, are completely recoverable You need to check the boxes for the files that you want to return from “oblivion” and click the corresponding button in the lower right corner.
On the right side of the screen, to make selection easier, there is a “Summary” tab, which contains detailed information about erased files.
In many cases, it makes sense to listen to program recommendations Please note that regardless of the type of drive from which data will be recovered, the procedure for using the program is the same.
What media does it work with?
In addition to hard drives on computers, laptops, netbooks and all-in-one PCs, Recuva can be used to check the following types of drives:
- memory cards;
- flash drives;
- digital players;
- smartphones;
- tablets;
- mobile phones;
- cameras;
- video cameras, etc.
This program will not be installed on any platform - for Android, for example, its analogue, Undeleter, is suitable.
Possible problems
Recuva is not only easy to install, but also easy to manage. It does not require additional knowledge. However, Recuva does not guarantee the recovery of any previously erased file, even if it was highlighted green, - this is its main problem. You can try to solve this difficulty using the Professional version or other utilities for recovering permanently deleted files.
“Partially recovered” files cannot be opened in the future The second common problem is that the program may not “see” the connected equipment: flash drive, phone, video camera, etc. First, it is recommended to disconnect the device from the computer and try to connect it again. If this does not help, you should update the device drivers. To do this, go to the “My Computer” tab, select the device, click on it right click mouse and select “Properties”. Go to the equipment tab and click on the “Properties” button.
If the program “does not see” the equipment, instead of the message “the device is working normally” there will be a message about the problem, and reinstalling the drivers can solve it The inability to recover after secondary deletion is the only problem that cannot be solved. If files were erased from the drive and then written to it new information or some other files were deleted a second time, then the utility will not be able to restore the originally erased ones - it simply will not find them.
The Recuva program is not overloaded with unnecessary functionality and unnecessary details. Having installed it, even a child will be able to figure out how to use the wizard of this utility. It helps to quickly recover permanently deleted files from any storage media.
Recuva – free utility for file recovery from developers from the British company Piriform. A fully functional version of the program can be downloaded for free, but there is also a paid edition of Recuva, which adds the function automatic update and support for recovery from virtual disk.
Advantages of Recuva
You can download the program on the official website of the developer. Installation file Recuva weighs a little more than 4 MB, the installed utility occupies 6 MB on the hard drive. Among other advantages:
- Completely free work.
- Russified interface.
- Availability of a recovery wizard that allows you to flexibly customize the procedure for searching for deleted files.
- Ability to add the “Search for deleted files” option to Explorer and Recycle Bin.
The “Search for deleted files” option in Explorer allows you to quickly launch a scan specific folder, from which the data was erased.
For example, a photo was stored in the Pictures folder. If you accidentally erased a photo, right-click the Pictures directory and search for deleted files. The scan will only be performed on that specific folder.
Purpose of the program
Recuva is a universal recovery program that can find and return files of any format. In one of the recovery wizard windows, you can specify what type of files to search for. 
This filter allows you to speed up the process of searching for erased data. If, for example, a document created in Word, Excel or one of the LibreOffice applications is deleted, then you just need to check the appropriate option so that the program does not search for other formats.
Recuva can find data that was on a formatted drive.
Some files will be damaged, but 90 percent are usually restored without problems - not bad for a utility that can be downloaded for free. However, in case of failure file system It is problematic to return information from a flash drive or disk using this program.
Recovery procedure
Recuva has a user-friendly interface, but a little instruction manual won't hurt: it's useful to know how to use the program to achieve maximum effect.
Once the scan is complete, you will see a list of found data. There is a colored circle next to each file. 
The color indicates the degree of damage:
- Green – no damage, ready for restoration.
- Yellow – there are problems, the file may not open.
- Red – data is damaged and cannot be restored.
To get files back, select them and click Recover. When restoring data, select a folder that is located on another drive.
You cannot save found files to the disk from which they were deleted!
If you are not satisfied with the recovery wizard, you can switch to Recuva's advanced mode. To do this, when starting the program, close the wizard window by clicking “Cancel”. In Advanced mode, you can specify which media to scan. Pay attention to the "Settings" button. 