How to use a disk analyzer on Android: a complete guide

Smartphones Android over time accumulate gigabytes of unnecessary files: application caches, duplicate photos, remnants of deleted apps and temporary data. Without regular cleaning, the device begins to slow down, overheat and discharge faster. This is where disk analyzer comes to the rescue - a tool that scans the phone's memory, identifies "garbage" and helps free up space.

In this article you will learn how to properly use such apps on Android, which of them are the most effective, and how to avoid mistakes when cleaning. We will analyze step-by-step guide, compare popular applications and give tips on optimizing memory without the risk of deleting important data.

We will pay special attention to the nuances of working with internal memory and SD cards, and also explain why some files cannot be deleted manually. If your smartphone is already signaling a lack of space or is simply running slower than usual, these instructions will help restore it to its former performance.

What is a disk analyzer and why do you need it

A disk analyzer is a app that scans the file system of a smartphone and shows data-i="42">. Unlike a standard file manager, this tool: which data takes up the most space. Unlike a standard file manager, this tool:

• 📊 Visualizes occupied space - shows charts and graphs by file type (photo, video, cache, APK, etc.).
• 🔍 Finds hidden files - detects the remains of deleted applications, temporary data and duplicates.
• ⚡ Speeds up cleaning - offers to instantly delete unnecessary files instead of manual search.
• 🛡️ Minimizes risks - some apps mark system files that should not be touched.

Without the analyzer, the user would have to manually view folders /data, /cache and /sdcard, which takes hours and is fraught with errors. For example, many people mistakenly delete the folder Android/obb, after which games with large data files stop working.

Among the most popular analyzers for Android — Files by Google, SD Maid, DiskUsage i Storage Analyzer. Each of these applications has its own characteristics, which we will talk about later.

⚠️ Attention: Some analyzers require root access for deep scanning of system folders. Without them, the app will show only user data (photos, music, downloads).

How to choose a disk analyzer for Android

Before installation, it is important to decide on the tasks: do you need simple visualization of occupied space or full cleaning with deleting cache and duplicates. Let's consider the key selection criteria:

Criteria	Files by Google	SD Maid	DiskUsage	Storage Analyzer
Free version	Yes, without restrictions	Yes, with advertising.	Yes	Yes
Deep scanning	No (user files only)	Yes (with root)	Partially	Yes (with root)
Delete cache	Yes	Yes, including system cache	No	Yes
Search for duplicates	Yes	Yes (in the Pro version)	No	Yes
Interface	Simple, in Russian	Complex, in English	Minimalistic	Convenient, with graphs

For most users, Files by Google will be the optimal choice - it is free, translated into Russian and integrated with system tools Android. If you need advanced functions (clearing the cache of system applications, searching for stopped processes), you will need SD Maid with root access.

When choosing, also consider:

• 📱 Android version - some apps do not support older versions (below Android 8.0).
• 💾 Presence of an SD card —not all analyzers work correctly with external drives.
• 🔒 Security —avoid little-known applications with suspicious permissions (for example, access to SMS or calls).

Step-by-step guide: how to use a disk analyzer

Let's look at a universal algorithm using an example Files by Google (the instructions are also suitable for other apps with minor changes). Before starting, make sure that:

All applications are closed (especially instant messengers and games)

The phone is charged at least 30%

A stable Internet connection is connected (for cloud ones) services)

A backup copy of important data has been created (optional)-->

Step 1. Installation and launch

Download the application from Google Play (links to official pages: Files by Google, SD MaidAfter installation, open). app and provide access to files and media (permissions Storage and Media and files).

Step 2. Quick scan

On the main screen, select tab Cleaning (in Files by Google) or Analyze (in SD Maid). The app will automatically scan:

• 🗑️ Application cache (temporary files that can be safely delete).
• 📁 Downloads (old APKs, documents, archives).
• 🔄 Duplicates (repeated photos, videos, audio files).
• 🧹 Garbage (remains of deleted apps, empty folders).

Step 3. Manual analysis

For a detailed analysis, go to section Storage (or Storage Analysis in other apps). Here you will see:

• 📊 Used space diagram by category (photos, videos, applications, etc.).
• 🔍 Large files (sorting by size).
• 📅 Old files (unused for more than 30/90 days).

Click on any category to see specific files. For example, in the section Photo You can filter out screenshots, memes or duplicate images.

Step 4. Cleaning

Tick the unnecessary files and click Delete (or Clean). Attention: some analyzers (for example, SD Maid) may offer to delete system files - do not agree if you are not sure of their purpose! After cleaning, reboot your phone to apply the changes.

Which files can be deleted and which cannot

The most common mistake when using analyzers is deleting system or important user data. Let's take a look at what can be safely cleaned and what should not be touched.

✅ Safe to delete:

• 🗑️ Application cache — temporary files that are restored automatically. Path: /data/data//cache.
• 📂 Downloads — APK, PDF, archives, that you downloaded manually (folder /Download or /Downloads).
• 🔄 Duplicates of photos/videos - especially relevant after transferring data from another device.
• 🎮 Remains of deleted games - folders Android/obb and Android/data from uninstalled applications.

❌ Delete DANGER:

• 📱 Folder Android —contains data of installed applications. Removing will lead to. failures.
• 🔧 Files with the extension .db, .odex, .vdex —system databases and optimized code.
• 📎 Hidden folders (starting with a dot, for example .thumbnails) - may disrupt operation galleries.
• 🔒 Files in /system —even with root access, deleting them can “brick” the device.

If the analyzer offers to delete a file whose name is unfamiliar to you, use the search in Google or service VirusTotal to check. For example, the file com.android.vending-1.apk is part of Google Play Market, and deleting it will break the app store.

⚠️ Attention: Some applications (for example, SD Maid) may mark cache files as "garbage" Google Play Services or Gboard. Removing them will lead to synchronization errors and problems with the keyboard.

Cleaning the SD card: features and risks

If your smartphone supports SD cards, the disk analyzer will help free up space on the external drive. However, there are several nuances here:

1. Formatting vs. manual cleaning

Many analyzers suggest formatting the SD card if there is a large amount of garbage. Do this only if:

• 🔄 There is no important data on the card (or it is reserved).
• 🛠️ The card is slow or produces errors.
• 📱 You use it only for media files (photos, music), and not for applications.

Formatting will remove all data, including hidden files that may be needed for some apps to work (for example, navigation maps in Google Maps or Yandex.Navigator).

2. Transferring applications to SD

If you use the card as internal memory (function Adoptable Storage in Android 6.0+), the analyzer can show it as part of the main storage. In this case:

• 🚫 Do not delete folders Android/data and Android/obb —this is data. transferred applications.
• ⚠️ Do not remove the card without first “unmounting” it in the settings (Settings → Storage → SD card → Eject).

3. Problems with reading the card

If the analyzer does not see the SD card or shows it as empty, check:

• 🔌 Connection - try rebooting the phone or inserting the card into another slot.
• 🛠️ File system - Android supported FAT32, exFAT and NTFS (the latter may require additional drivers).
• 🔍 Presence of viruses - scan the card with an antivirus (for example, Malwarebytes).

What to do if the analyzer does not see the SD card?

1. Reboot phone.

2. Check the card on another device (computer or another smartphone).

3. Format the card in FAT32 or exFAT via a computer.

4. data using Recuva or PhotoRec (PC required).

Memory optimization without an analyzer: alternative methods

Disk analyzers are convenient, but not always necessary. If you prefer to do without third-party apps, use the built-in tools. Android:

1. Built-in cleaning in settings

Go to Settings → Storage → Cleaning (the path may differ depending on the version Android and shell). Here the system will offer:

• 🗑️ Delete application cache.
• 📥 Clear downloads.
• 🔄 Delete unused files (for example, screenshots older than 30 days).

2. Files

Even without installing third-party analyzers, you can use Files by Google (pre-installed on many devices). Open the application and go to the Cleaning tab - basic scanning and garbage removal functions are available here.

3. Manual cleaning through Explorer

Open any file manager (for example, Solid Explorer or standard Explorer) and manually check the folders:

• /Download — delete unnecessary APKs, archives, documents.
• /DCIM/.thumbnails — photo thumbnails (can be deleted, they will be restored automatically).
• /Android/data —data of deleted applications (folders with the names of uninstalled apps).

4. Transfer files to the cloud

If not. The device is critically short of space, transfer photos and videos to Google Photos, Yandex.Disk or Dropbox. Most services offer automatic downloading of media files when connected to Wi-Fi. After transferring, the originals can be deleted from the phone (in the cloud storage settings, select Free up space).

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes when working with disk analyzers. Here are the most common ones and ways to prevent them:

1. Deleting system files

Some analyzers (especially with root access) show system files as “garbage” For example:

• /system/priv-app — system applications.
• /data/dalvik-cache — optimized cache to speed up applications.
• /system/bin — executable files Android.

Deleting this data will lead to cyclic reboot the phone or its complete inoperability.

2. Clearing the cache of important applications

The cache of messengers (WhatsApp, Telegram), navigators (Google Maps) or banking applications contains important data:

• 💬 In WhatsApp the cache includes media files from chats.
• 🗺️ In Google Maps - downloaded cards for offline mode.
• 🏦 In banking applications - temporary security keys.

Before cleaning, check which files will be deleted.

3. Ignoring backups

Before mass deleting files (especially photos, contacts or messages), create a backup copy To do this:

• 📱 Use Google Account to synchronize contacts and calendar.
• ☁️ Upload a photo to Google Photos or Yandex.Disk.
• 💾 Applications like SMS Backup & Restore.

4 are suitable for SMS and call logs. Excessive cleaning

Some users strive to free maximum possible locationby deleting even useful files. For example:

• 🎵 Removing all music from the folder /Music, including ringtones.
• 📂 Cleaning the folder /Ringtones, after which the ringtones disappear alarm clock.
• 📖 Removing e-books from /Books or /Documents.

Check the contents of the folders before deleting!

⚠️ Attention: If after cleaning the phone starts to slow down or overheat, an important system file may have been deleted. In this case, resetting to. factory settings (Settings → System → Reset).

FAQ: answers to frequently asked questions

Can I use the disk analyzer without root access?

Yes, most analyzers (for example Files by Google or DiskUsage) work without root, but show only user files. To deeply scan system folders (/data, /system), root access is required.

Why does the analyzer show that memory is busy, but not finds large files?

This can happen for several reasons:

• 📱 Hidden system files —they are not displayed without root access.
• 🔒 Encrypted data —some applications (for example, instant messengers) store encrypted databases.
• 🗑️ Application cache —may occupy gigabytes, but is not displayed as separate files.

Try using another analyzer (for example, SD Maid) or check the occupied space in your phone settings (Settings → Storage).

How to clear memory if the analyzer does not help?

If the analyzer does not find garbage, but the disk space is running low, try:

1. Delete unused applications (Settings → Applications).
2. Clear the cache Google Play Services and Google Play Market.
3. Transfer photos and videos to your computer or the cloud.
4. Check the folder /Android/obb - sometimes there files from long-deleted games remain.
5. Reset the cache (Settings → Storage → Cached data).

Is it possible to restore files after cleaning with the analyzer?

If files were deleted through the analyzer, their recovery is unlikely, since such apps use permanent deletion (as opposed to the recycle bin Windows). However, you can try:

• 🔍 Use data recovery apps (DiskDigger, Recuva on a PC).
• ☁️ Check backups in Google Drive or other cloud services.
• 📱 If files have been synchronized, check the corresponding applications (for example, photos in Google Photos).

The chances of recovery are higher if little time has passed since the deletion and no new data has been written to the disk.

How often should you use the disk analyzer?

The frequency depends on the intensity of use smartphone:

• 📱 Active users (many applications, games, media files) - once every 1-2 weeks.
• 📞 Average load (social networks, instant messengers, photos) - once a month.
• 🧘 Minimum use (calls, SMS) - once every 2-3 months.

It is also recommended to run the analyzer before installing major updates or new games to free up space.