Thumbsmall folder on Android: why do you need it, how to clear it and what will happen if you delete it

Have you ever looked into the storage of your Android smartphone and discovered a mysterious folder thumbsmall or thumbnailsthat takes up hundreds of megabytes - or even gigabytes - of memory? Many users panic and try to remove it, not understanding why you need it at all. Meanwhile, this is one of the key system folders responsible for quickly loading thumbnails of images and videos in the gallery, messengers and even some applications.

In this article we will look in detail at:

• 🔍 What is thumbsmall and how it relates to the work of Android;
• 📁 Where it is located this folder and why it grows to gigantic proportions;
• ⚠️ Is it possible to delete it without consequences for the system;
• 🧹 How to properly clear thumbnail cache without breaking the gallery;
• 🔄 What to doif after deleting thumbsmall the pictures are not displayed.

Spoiler: just erasing this folder is a bad idea. But there are ways to reduce its size by 10 times without risking the data. Read on!

What is a thumbsmall on Android and why do you need it?

The folder thumbsmall (or .thumbnails, DCIM/.thumbnails) is a system thumbnail cache that Android creates to speed up the display of image and video previews. Every time you open a gallery, messenger (WhatsApp, Telegram) or file manager, the system does not load the original files in full resolution (which takes time and resources), but shows their reduced copies - thumbnails.

Why is this important?

• ⚡ Battery saving: processing thumbnails requires less energy than decoding full-size photos;
• 🚀 Fast scrolling: the gallery does not freeze when you scroll through hundreds of pictures;
• 📶 Less traffic: if there are already thumbnails, applications do not download the preview again (relevant for cloud services).

However, this system has a serious drawback: Android does not always correctly clear outdated thumbnails. As a result, the folder grows to several gigabytes, taking up precious space on the internal drive. This is especially noticeable on budget smartphones with 16–32 GB memory.

Where is the thumbsmall folder and how to find it

The folder with thumbnails can be located in different places depending on the version of Android and the smartphone manufacturer. Here are the most common paths:

Device/Firmware	Folder path	Notes
Stock Android (Pixel, Motorola)	/storage/emulated/0/DCIM/.thumbnails	Hidden folder, visible only when you enable show hidden files
Samsung (One UI)	/storage/emulated/0/Pictures/.thumbnails	Can be duplicated in DCIM
Xiaomi (MIUI)	/storage/emulated/0/MIUI/Gallery/cloud/thumb	Separate folders for local and cloud thumbnails
Huawei (EMUI)	/storage/emulated/0/Huawei/Thumbnails	Often protected from deletion without root

To find the folder:

1. Open any file manager (for example, Files by Google, Solid Explorer);
2. Turn on display hidden files (in the manager settings);
3. Follow one of the paths from the table above or use search by word thumb.

If there is no folder, do not be alarmed. On some firmware (for example, OxygenOS on OnePlus), thumbnails are stored in the media provider database (media provider) and are not displayed as separate files.

Why is the thumbsmall folder may disappear after updating Android?

Starting with Android 10, Google introduced a new thumbnail storage system - MediaStore APIwhich partially moved the cache to a protected area. However, many manufacturers (especially Chinese) still use the old method with physical files.

Why does the thumbsmall folder take up so much space?

Normally, the size of a folder with thumbnails should not exceed 200–500 MB. But in practice, users are faced with folders weighing 1–5 GB reasons:

1. Duplicating thumbnails: Android creates previews for the same file in different resolutions (for example, for the gallery, messengers and launcher).
2. Deleted files: if you deleted a photo from the gallery, but did not empty the trash, the thumbnails remain in the cache.
3. Application errors: some apps (for example, Viber or Instagram) create their own copies of thumbnails without optimizing them.
4. System bugs: on Android 8–9 there was a bug due to which the folder .thumbnails grew uncontrollably.

Critical information: on devices with micromemory cards (microSD), the thumbsmall folder can be duplicated on an external drive, taking up space twice. This is due to the fact that Android treats the SD card as a separate volume, but some applications (for example Google Photos) cache thumbnails and there.

Is it possible to delete the thumbsmall folder without consequences

Brief. answer: yes, you can, but with reservations. Deleting the folder will not damage the system, but will lead to two consequences:

• ⏳ The gallery will take longer to load when first opened after cleaning (the system will have to re-generate thumbnails);
• 🔄 Some previews will disappear from instant messengers and launchers until the device is rebooted.

What NOT to do:

⚠️ Attention! Never delete the thumbsmall folder via root access or commands ADBif you are not sure of your actions On some firmwares (for example, ColorOS on Oppo/Realme) this may cause the media scanner to fail, and the gallery will stop displaying photos altogether.

Safe cleaning methods:

• 🧹 Via storage settings Android (the "Clear cache" item for the "Gallery" application);
• 📱 Via specialized utilities (for example, SD Maid or CCleaner);
• 🔧 Manually, but with preliminary backup media files.

How to properly clear thumbsmall: step-by-step guide

If you decide to delete the folder manually, follow this algorithm:

1. Close all applicationsthat can use the gallery (WhatsApp, Google Photos, launcher).
2. Open file manager with access rights to system folders (for example, FX File Explorer or Root Explorer for rooted devices).
3. Navigate to the path:

   /storage/emulated/0/DCIM/.thumbnails

   or use word search thumb.

4. Select all files in the folder and click “Delete.” If the folder is not deleted, try renaming it (for example, to .thumbnails_old), and then erase it.
5. Restart the device.

After restarting, Android will automatically create a new folder .thumbnails and start generating thumbnails again. may take from 5 minutes to several hours depending on the number of media files.

For automatic clearing without manual intervention:

1. Go to Settings → Storage → Free up space.
2. Select “Thumbnail cache” or “Media files”.
3. Confirm cleaning.

⚠️ Attention! On some firmware (for example, Flyme on Meizu) automatic cleaning can remove not only thumbnails, but also photo metadata (date of shooting, geotags). Before the procedure, check whether this data is saved in the original files.

What to do if photos are not displayed after deleting thumbsmall

In rare cases, after clearing the thumbnail cache, the gallery can:

• 🖼️ Show empty previews (gray squares);
• ❌ Throw an error "Media files not found";
• 🔄 Infinitely update library.

Solutions:

Problem	Cause	How to fix
Gray previews	The system has not generated new thumbnails yet	Wait 10-30 minutes or restart your phone
Error "Media files not found"	Media scanner failure	Go to Settings → Applications → Gallery → Storage → Clear data
Endless update	Conflict with the cloud service (Google Photos)	Disable synchronization in Google Photos settings for 10 minutes

If all else fails, try reset the settings media provider:

1. Go to Settings → Applications → Show all applications (⋮).
2. Find Media storage (Media Storage) or Google Photos.
3. Click “Clear cache” and “Clear data.”
4. Restart the device.

On Samsung may an additional step is required: disable and re-enable the application Gallery in the application settings.

How to prevent thumbsmall from growing in the future

To prevent the thumbnail folder from taking up gigabytes of memory, follow these tips:

• 📅 Regular cleaning: once a month, delete the gallery cache through the storage settings;
• 🚫 Limit instant messengers: in WhatsApp and Telegram disable automatic saving of media to the gallery (Settings → Storage and data → Autoload media);
• ☁️ Use cloud: Google Photos in the "Original quality" mode, stores thumbnails on servers, not on the device;
• 🗑️ Clean trash: in the gallery Samsung and Xiaomi deleted photos remain in the trash 30 days, and their thumbnails also take up space;
• 🛠️ Disable unnecessary albums: in Google Photos go to Settings → Albums on the device and disable synchronization for folders like Screenshots or Downloads.

For advanced users:

• 🐧 On rooted devices you can redirect the thumbsmall folder to SD card using FolderMount;
• 🤖 Using ADB you can limit the size of the thumbnail cache with the command:

  adb shell settings put global thumbnail_cache_max_size 52428800

  (where 52428800 is the maximum size in bytes, here 50 MB).

⚠️ Attention! Details of working with ADB and root may vary depending on the version of Android and firmware. Before experiments, check the latest information on forums like XDA Developers or 4PDA.

FAQ: Frequently asked questions about thumbsmall on Android

❓ Why does the folder appear again after deleting thumbsmall?

This is normal Android behavior. The system automatically recreates the folder .thumbnails when you first open the gallery. or messenger. To prevent thumbnails from taking up a lot of space, clear the cache regularly (once every 1-2 weeks).

❓ Is it possible to transfer thumbsmall to an SD card?

On most devices, no, since the folder is linked to internal storage. Exception: rooted phones with support. data-i="267">or applications like init.d-scripts or apps like FolderMount. However, this can lead to lags when opening the gallery if the SD card is slow.

❓ Why on one phone thumbsmall weighs 100 MB, and on another - 3 GB?

The folder size depends on:

• The number of media files (photos, videos, gifs);
• Screen resolution (on 4Kdisplays the thumbnails are larger);
• Firmware (manufacturers optimize the cache in different ways);
• Presence of duplicates (for example, if one photo is in both DCIMand Pictures).

❓ Will the gallery work faster if you disable thumbnails?

No, on the contrary - without the thumbnail cache, the gallery will be slow down when scrolling, since each time you will have to load and scale the original files. The best option: do not disable thumbnails, but control their size (see the section on prevention).

❓ How to restore thumbnails if they disappeared after cleaning?

Android will restore them automatically the next time you open the gallery. If this does not happen:

1. Reboot. phone;
2. Clear the cache of the Gallery application;
3. Check whether synchronization with Google Photos is disabled;
4. Install an alternative gallery (for example, Simple Gallery), which will create new thumbnails.