Xiaomi smartphones with limited internal memory often face space shortages due to heavy use of WhatsApp. The messenger automatically saves photos, videos, voice messages and chat backups to internal storage, quickly filling it. Transferring this data to a microSD card frees up space and speeds up the device, but requires proper configuration.
In this article, you will find unique solutions for Xiaomi, including hidden settings. MIUI, Bypassing Android restrictions and step-by-step instructions for different versions of WhatsApp, we’ll also explore why standard porting through messaging settings doesn’t always work on Redmi devices, POCO Mi and what to do if the system gives an error "Failure to move files».
Why WhatsApp doesn’t save files SD-default-card
The reason lies in the security policy of Android and features of the file system. MIUI. Starting with Android 4.4 KitKat, Google has restricted apps from accessing external drives to prevent abuse. WhatsApp follows these rules and defaults to saving media files in a folder:
/storage/emulated/0/WhatsApp/Media/On Xiaomi, things are complicated:
- 🔒 Protected regime MIUI — system blocks the record SD-card for third-party applications if the card is formatted as portable storage (rather than internal memory).
- 📁 Formatting a card – if the microSD is formatted in FAT32, It does not support files larger than 4GB (relevant for long-form videos).
- 🔄 WhatsApp updates – new versions of the messenger can reset user storage settings.
In addition, in MIUI 12/13/14 Added a memory optimisation mechanism that automatically clears the cache of applications, including files uploaded via WhatsApp, which leads to the loss of media, even if they were manually transferred to the site. SD-map.
Preparation: checking the memory card and settings Xiaomi
Before transferring files, make sure your SD-It's compatible with the device and it's configured correctly:
- Check the format of the map: 📌 Open the Settings. → Warehouse → Memory map. 📌 If the card is displayed as Portable Storage, it will have to be reformatted (data will be deleted!). 📌 The best format for WhatsApp is exFAT or NTFS (file-support >4GB).
- Set up access rights: 🔓 Go to Settings. → Annexes → Application management → WhatsApp → Permits. 🔓 Enable Warehouse Permits and Memory Card.
- Turn off optimization. MIUI: ⚙️ B Settings → Battery and performance → Memory optimization add WhatsApp to exceptions.
⚠️ Note: If you format the card as internal memory (in Warehouse settings) → Memory map → Set up as an internal one, consider:
- The card will be encrypted and will not be read on other devices.
- After retrieving the map, the applications installed on it will cease to work.
Check the format of the map (exFAT/NTFS)
Set up access rights for WhatsApp
Turn off memory optimization in MIUI
Backup your data from the card (if necessary)
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Method 1: Transfer media files through WhatsApp settings
The easiest method is to use the built-in features of the messenger, which is suitable for photos, videos and voice messages, but does not affect backups of chats.
- Open WhatsApp and go to the ⋮ → Settings → Warehouse and data.
- Click on “Storage Management” – all media files sorted by size are displayed here.
- Select files for transfer: 📸 For photo: tick the desired images. 🎥 For video: use a filter sized (e.g, >50MB).
Press the basket icon (🗑️)
Save it to the memory card.
🔹 Limitations of method:
- 🚫 Documents not transferred (PDF, APK, XLS etc. – you will have to copy them manually.
- 🚫 Files remain in internal memory, just create a copy of them. SD-map.
- 🚫 On some Xiaomi models (e.g. Redmi) 9A) The option “Save to memory card” may not be available.
💡
If there is no port option, try updating WhatsApp to the latest version or clearing the app cache in Android settings.
Method 2: Manually transfer files through file manager
If WhatsApp does not offer a saving option SD-Map, use the built-in Explorer (MI File Manager or a third-party application (e.g. Solid Explorer) works for all file types, including backups.
- Open the Explorer and go to the folder: /storage/emulated/0/WhatsApp/ Here you will see subfolders: Media (media files), Databases (chat backups), Backups (copies of Google Drive).
- Select the folders you want (like Media) and click Copy.
- Go to the SD-map (usually path) /storage/XXXX-XXXX/WhatsApp/, where XXXX-XXXX — ID map).
- Insert the files and wait for the copy to be completed.
⚠️ Attention: When manually transferring backup copies of chats (msgstore.db.crypt14) consider:
- The copy file should be named exactly like the original (no name changes!).
- After the transfer, restart the phone or WhatsApp won’t see a copy.
- If you are restoring chats from a copy to SD-map, before you delete WhatsApp and install again.
| Type of file | source folder | Where to copy | Notes |
|---|---|---|---|
| Photo/video | /WhatsApp/Media/ | /SDCard/WhatsApp/Media/ | Keep the subfolder structure (Images, Video) intact! |
| Backup copies of chats | /WhatsApp/Databases/ | /SDCard/WhatsApp/Databases/ | The file name should end with.crypt14 |
| Voice communications | /WhatsApp/Media/WhatsApp Voice Notes/ | /SDCard/WhatsApp/Media/WhatsApp Voice Notes/ | File format:.opus or.ogg |
| Documents | /WhatsApp/Media/WhatsApp Documents/ | /SDCard/WhatsApp/Media/WhatsApp Documents/ | Including PDF, APK, ZIP etc. |
Method 3: Automatically save new files to SD-map
To ensure that all new media files from WhatsApp are automatically saved to a memory card, use the “Download Media” function in the messenger settings:
- Open WhatsApp and go to the ⋮ → Settings → Warehouse and data → Storage management.
- Click Autoload Media and select the network type (Mobile Data, Wi-Fi or Roaming).
- Enable the Save to the Gallery option (if you have one in your version).
- Install a third-party app to redirect downloads (like AutoSave for WhatsApp from Google Play).
🔹 How does AutoSave for WhatsApp work:
- 🤖 The app tracks new files in the WhatsApp folder.
- 📥 Automatically copying them to SD-map according to the given rules (for example, only video) >10MB).
- 🗑️ Can delete originals from internal memory after copying.
Why WhatsApp doesn’t see files SD-post-transfer?
Problem Solving: Errors in File Transfer
When working with WhatsApp and SD-Xiaomi users often encounter common mistakes. Here's how to fix them:
| Mistake. | Reason. | Decision |
|---|---|---|
| Failed to move the files | Insufficient rights or card formatted as portable storage | Reformat the card as internal memory or use manual copying |
| SD-map not found | The card is not inserted or damaged | Check the slot contacts, try another card |
| The file is too large (when copied) | The map is formatted in FAT32 (Max. 4GB per file) | Reformatting into exFAT/NTFS (data will be deleted!) |
| Media not displayed in the gallery | Files hidden or path changed | Check the folder. /SDCard/WhatsApp/Media/ guide |
🔧 Additional advice:
- 🛠️ If WhatsApp “hangs” when transferring files, force the application to stop in Android settings and try again.
- 🔄 After transferring backup chats (msgstore.db.crypt14) Reinstall WhatsApp so that the messenger “sees” a new copy.
- 📶 If you copy slowly, turn off the mobile Internet – this will speed up the process.
💡
On Xiaomi devices with MIUI 14 and newer for WhatsApp stable operation with SD-card be sure to disable the function "Memory Optimization" in the battery settings.
How to Restore WhatsApp Chats with SD-map
If you have transferred a backup copy of chats to a memory card and want to restore them (for example, after a phone reset), follow this instruction:
- Remove WhatsApp (if installed) and download the latest version from Google Play.
- Put it in. SD-card to phone and make sure the folder with the copy is on the way: /SDCard/WhatsApp/Databases/msgstore.db.crypt14
- Install WhatsApp and go through the initial setup (enter your phone number, confirm the code).
- When you request a recovery, click "Restore." The messenger will automatically find a copy of the SD-map.
- Wait until it is completed – the process can take up to 10-15 minutes depending on the size of the copy.
⚠️ Note: If WhatsApp does not find a backup:
- Check what the copy file is called msgstore.db.crypt14 (symbolless!).
- Make sure that the Databases folder is inside /SDCard/WhatsApp/ (not the root of the map).
- If a copy is damaged, try to restore it using WhatsApp. Key/DB Extractor (PC required).