Your Samsung Galaxy J7 (regardless of the modification - J700H, J710F or J730F) began to slow down and give "Insufficient memory" errors or close applications spontaneously? The reason in 90% of cases lies in a clogged storage unit. Even with 16 GB of internal memory (and some versions have even less - 8 GB), the device can work stably if the data is managed correctly. But over time, temporary files, application caches, duplicate photos and remnants of deleted apps accumulate, which eat up precious megabytes.

In this article - 7 proven ways to clear memory without root access and loss of important data. We will analyze both standard tools Android 5.1/6.0/7.0 (depending on the firmware version of your J7), and third-party utilities that will safely remove garbage. We will pay special attention hidden folders, which take up to 3-5 GB, but are not displayed in the standard file manager. And at the end - a checklist for monthly maintenance of your smartphone so that the problem does not return.

⚠️ Important: Before cleaning, check the real state of the memory. Go to Settings → Device → Memory. If more than 70% of the “System Memory” section is occupied, proceed with action. If less than 1 GB is free, some applications may not update or crash.

1. Clearing application cache: a quick way to free up 1-3 GB

Caches are temporary files that applications create to speed up their work. Over time, they accumulate and can take up gigabytes of memory. On Samsung Galaxy J7 the cache can be cleared in two ways: for individual applications or completely for all.

Method 1: Clearing the cache for a specific application

  1. Go to Settings → Applications.
  2. Select an application (for example, Facebook or YouTube).
  3. Click Storage → Clear cache.

Method 2: Mass clear cache (requires reboot)

  1. Go to Settings → Device → Memory.
  2. Click Cached data → confirm clearing.
  3. Reboot your phone (required!).

🔹 Which applications "eat up" the cache the most?

  • 📷 Instagram, TikTok - up to 500 MB each.
  • 🎮 Games (PUBG Mobile, Free Fire) - up to 1-2 GB.
  • 🌍 Maps (Google Maps, Yandex.Navigator) - up to 1 GB.
  • 📺 Video players (MX Player, VLC) - up to 300 MB.
💡

After clearing the cache, some applications (for example Google Play Market or Chromemay take longer to load when first launched. This is normal - the cache is created anew.

2. Removing unnecessary files through the built-in file manager

Standard application My files (or File Manager) on Samsung Galaxy J7 allows you to find and delete large or outdated files. Most often, memory is occupied by:

  • 📸 Duplicate photos (created when editing or sending). via messengers).
  • 🎵 Downloads (APK files, PDF, archives).
  • 📹 Video from messengers (automatically saved in WhatsApp/Media or Telegram/Telegram Video).
  • 📄 Logs and dumps (folder log or bugreports in the root of memory).

How to find and delete:

  1. Open My files → Internal storage.
  2. Click on the three dots in the upper right corner → Storage analysis.
  3. Select a category (for example, "Large files" or "Downloads").
  4. Mark unnecessary files and click Delete.
File type Typical size Can I delete
APK files (installation packages) 20-100 MB each Yes, if the application is already installed
Files .nomedia 0 KB, but hide media Delete only if you know what they are for
Folder DCIM/.thumbnails 100-500 MB Yes, these are photo thumbnails
Files with the extension .tmp From 1 MB to several GB Yes, these are temporary files
What to do if the files are not deleted?

If the system gives the error "File busy" or "No rights", try:

1. phone.

2. Delete the file via PC (connect J7 as a USB drive).

3. Use a file manager with root access (for example Root Explorer), if you have root access.

3. Storage optimization via Smart Manager (built-in Samsung utility)

Samsung Galaxy J7 equipped with a proprietary utility Smart Managerthat analyzes memory, RAM, battery and security:

  1. Open Smart Manager (green leaf icon).
  2. Select the tab Storage.
  3. Click Clear next to the "Unnecessary data" section.
  4. Confirm deletion (the system will show how much space will be freed up).

What Smart Manager deletes:

  • 🗑️ Temporary application files.
  • 📥 Remains of deleted applications apps.
  • 📂 Empty folders.
  • 🔄 Duplicate files (only in new versions of the utility).

⚠️ Attention: Smart Manager does not clear the cache of system applications (for example, Samsung Keyboard or S Health). To do this, you need to use the method from first section.

📊 How often do you clear the memory on your smartphone?
Once a week
Once per month
Only when space runs out
Never cleaned

4. Removing system garbage using CCleaner or Files by Google

Standard tools Android do not always cope with deep cleaning. Third-party utilities, such as CCleaner or Files by Googlecan find and delete:

  • 🗃️ Remains of uninstalled applications (folders in /data/data).
  • 📁 Empty folders (remain after updates).
  • 🔍 Files without extension (often useless).
  • 📊 Old system logs (log files).

Instructions for CCleaner:

  1. Install CCleaner from Google Play.
  2. Run analysis (button Analysis).
  3. Select categories to clean (we recommend checking all except "Call history").
  4. Click Clear.

Instructions for Files by Google:

  1. Install the application and open it.
  2. Go to the tab Cleanup.
  3. Select "Junk files" or "Duplicates".
  4. Delete selected items.

Back up important data|Close all running applications|Connect your phone to charge|Check free space after cleaning-->

5. Transferring data to a memory card or cloud

If the built-in memory Samsung Galaxy J7 is full and you don’t want to delete files, transfer them to microSD (up to 256 GB) or to cloud storage Options:

Transfer. to a memory card:

  1. Insert microSD into the slot (on J7 it is usually located under the cover next to the SIM card).
  2. Open My files → select files (photos, videos, music).
  3. Click Move → select Memory card.

Cloud services:

  • ☁️ Google Photos —automatic uploading of photos/videos (15 GB free).
  • ☁️ Yandex Disk — 10 GB free, autoload available.
  • ☁️ OneDrive — 5 GB free, integration with Microsoft Office.

⚠️ Attention: When transferring applications to an SD card (via Settings → Applications → Transfer to SD), please note:

- Not all apps support this function.

- After removing the card, applications will stop working.

- Speed of applications running from the SD card lower than from internal memory.

6. Resetting to factory settings: a last resort

If Samsung Galaxy J7 it slows down even after cleaning, and there is critically little free memory, it will help Hard Reset (resetting to factory settings). This method will delete all data, including accounts, photos and applicationsso make a backup copy first!

How to reset:

  1. Go to Settings → Backup and reset.
  2. Select Reset data (or Reset settings).
  3. Confirm the action (you may need to enter a PIN code).
  4. Wait for the reboot (it will take 5-10 minutes).

What to do after the reset:

  • 🔄 Restore the data from the backup (if done via Samsung Account or Google).
  • 📥 Install only necessary applications (avoid "junk" apps).
  • 🔧 Disable auto-downloading of media files in messengers.
  • 🛡️ Install an antivirus (for example, Malwarebytes) to protect against malware.
💡

Reset to factory settings is the only way to remove system garbage, which accumulates over the years and is not cleared by standard methods.

7. How to prevent memory filling in the future

To prevent the problem from returning, follow these simple rules:

Monthly maintenance:

  • 📅 Clear application cache (once a month).
  • 🗑️ Delete files from the folder Downloads.
  • 📸 Transfer photos older than 3 months to the cloud or on a PC.
  • 🔄 Update applications (new versions are often optimized for memory).

Settings to save memory:

  • 🚫 Disable autosaving of media in instant messengers (Settings → Memory → Autoload media).
  • 🎵 Use streaming services (Spotify, YouTube Music) instead of storing music locally.
  • 📺 Adjust the video quality in YouTube to "Saving traffic."

🔹 Useful life hack: Install the application SD Maid (requires root access) to automatically clean up garbage on a schedule. It will find and delete even those files that are not visible by standard means.

📊 Which method do you most often clean? memory?
Manually through a file manager
Using Smart Manager
Third-party applications (CCleaner, etc.)
Transfer files to a memory card
Do not clear

FAQ: Frequently asked questions about clearing Samsung Galaxy J7 memory

Is it possible to clear the memory without losing data?

Yes, the first 6 methods in this article (except for resetting to factory settings) do not affect personal files. However, always make a backup copy of important data before any manipulation.

Why do apps run slower after clearing cache?

This is normal: the cache speeds up the loading of frequently used data. After clearing, the application needs time to create a new cache. After 1-2 launches, the speed will return to normal.

How to find out which applications take up the most memory?

Go in in Settings → Applications, click on the three dots at the top → Sorting by size. The system will show applications from the heaviest to the lightest.

Is it possible to increase the internal memory of the Samsung Galaxy J7?

Physically, no, since the memory is soldered into the motherboard. But you can:

  • Use microSD as internal memory (function Adoptable Storagerequires Android 6.0+).
  • Transfer applications to an SD card (not all support this function).
What to do if the phone says “Memory is full”, but the settings show 5 GB free?

This is a file system error. Try:

  1. Restart the phone.
  2. Clear cache via Recovery Mode (press Volume + + Home + Power, select Wipe Cache Partition).
  3. Delete folder .Trash (trash) in the internal memory.