Did you insert a microSD into Xiaomi Redmi 7, copy photos, but the gallery stubbornly ignores files? Or did the Suddenly memory card stop being identified after the MIUI update? The problem is familiar to many owners of this smartphone - especially after switching to MIUI 12/13 or when using cards larger than 64 GB.
In 80% of cases, software limitations are not to blame for hardware malfunctions, but for software constraints: disabled application permissions, failures in mounting the drive or conflicts with the file system. SD-From basic settings to hidden commands for power users, no magic buttons or universal tips: only proven solutions explaining why they work.
1. Verification of physical connection and card compatibility
Before digging into the settings, make sure the problem isn't "hardware." - Xiaomi Redmi 7 supports microSD up to 256GB, but with nuances:
- 🔹 File system format: exFAT cards (from 64 GB) often conflict with the MIUI. The best option — FAT32 (up to 32 GB or NTFS (if the smartphone supports).
- 🔹 Speed class: for recording video 4K need a map UHS-I (U1/U3). Class cards 4/6 may slow down reading.
- 🔹 Slot: Redmi 7 Hybrid Slot (2 SIM + microSD OR 1 SIM + microSD. Make sure that SIM-The card does not block contacts.
How to check:
- Remove the card and inspect the contacts for oxidation or contamination.
- Try inserting it into another device (laptop, camera) and if it doesn't read, it's the card, not the phone.
- Insert a working card (for example, from a friend) in Redmi 7, if it is determined, your SD is damaged.
⚠️ Note: Do not use cards with microSD adapters→SD In Redmi 7. the contacts of the hybrid slot are not designed for additional load - this can lead to damage to the connector.
2. Set up permissions for gallery and file manager
MIUI aggressively restricts applications from accessing external drives, and even if the card is physically connected, the gallery may not see files due to a lack of permissions.
How to check and correct:
- Open Settings → Applications → Application Management.
- Find the Gallery (or Google Photos if you use it) and tap it.
- Select permissions → memory and set the switch to the Allow position.
- Repeat the steps for the File Manager (MI File Manager).
If permissions are already included, but the map is not visible:
- 🔄 Restart your phone - sometimes MIUI Resets rights after updates.
- 📁 Delete gallery data: Settings → Annexes → gallery → Warehouse → Clear the data (photos will not be deleted, only settings will be reset).
| Annex | Permission required | Additional action |
|---|---|---|
| MIUI Gallery | Memory (reading/write) | Clear the cache after changing permissions |
| Google Photo | Memory + Camera (for auto-save) | In the application settings, enable "Supplies with SD" |
| MI File Manager | Memory + Access to all files | In the file manager settings, enable "Show hidden files" |
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If the gallery scans files for a long time after cleaning the data, connect the phone to charge. MIUI limits background processes when the battery is low (<30%).
3. Mounting SD-The card is an internal memory (adoptable storage)
By default, Redmi 7 mounts SD-It's like a removable drive, and in this mode, applications (including the gallery) don't always have access to files, and the solution is to convert the card to internal memory, but there are pitfalls in this method.
Advantages:
- 📱 Applications can be installed on SD.
- 🖼️ Gallery and other programs get full access to files.
Disadvantages:
- ⚠️ The map will be encrypted and will only work on this phone.
- 🔄 After extraction, all data on it will become inaccessible.
- 📉 Speed is lower than that of the built-in memory.
How to turn on Adoptable Storage:
- Put it in. SD-phone-card.
- When the notice “New” appears SD-map" tap "set up.
- Select Internal Memory (not Portable Storage).
- Follow the instructions on the screen. The phone will tell you to format the map, you can agree.
- After formatting, select Transfer Data if you want to move some applications to SD.
⚠️ Note: If you have already used the card as a portable, make sure to back up the data before converting to internal memory!
What if the “Inner Memory” option does not appear?
4. Correction of File System Errors and Media Cache
If SD-The card is determined in the file manager, but the gallery does not show the photo, the problem may lie in the file manager:
- 🗃️ A damaged media database (.nomedia file or media provider failure).
- 🔧 File system errors (for example, after incorrect card extraction).
- 📂 Hidden folders with media files.
Step-by-step solution:
- Rebuild the media base: Delete the.nomedia file at the root SD-maps (if any) Open Settings → Annexes → Show all applications → Press the storage. → Clear the data and restart the phone.
- Check the file system: Connect your phone to your PC via USB (Open the Command Prompt (Windows) and execute: chkdsk X: /f (where X is your letter SD-map).
- Update gallery cache: Open the gallery, pull down for an update. If it doesn't work, delete the gallery data (see section 2).
☑️ Diagnosing problems with SD-card
5. MIUI specific problems: hidden settings and bugs
Xiaomi Redmi 7 based on MIUI has several hidden restrictions that are not documented in the official instructions.
- 🔒 Blocking by region: on some firmware for India/China SD-map-size >128GB is not supported.
- 🔄 Dual Apps conflict: If you cloned a gallery, the clone may not see SD.
- 📵 Background restriction: MIUI Stops the media scan if the phone is under 15%.
How to get around:
- Change the firmware region: Go to Settings → Additional → Region. Choose Russia or Global (if you have Chinese firmware). Reboot your phone.
- Turn off battery optimization for gallery: Open Settings → Battery and performance → Battery Optimization. Find Gallery and select No Limits.
- Reset security settings: Go to Settings → Passwords & Security → Privacy settings. Select Reset (this won’t delete data, only reset permissions).
If you are using custom remediation (TWRP), try:
- Download to TWRP.
- Select Mount → Enable MTP.
- Connect your phone to your PC and manually check the contents SD-map.
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On MIUI 12.5+ firmware for Redmi 7, a rollback to MIUI 11 via Fastboot can help.This is due to a bug in exFAT processing in new versions.
6. Alternative ways to access files on SD
If the standard methods do not work, use the workarounds:
- 🌐 Cloud Services: Copy files from SD On a PC, then upload them to Google Photos or Mi Cloud. In the gallery, enable cloud sync.
- 📎 Third-party file managers: 📂 Solid Explorer or Solid Explorer FX File Managers often work better. SD, more standard MI File Manager. 🔍 In the third-party manager settings, enable the option “Show hidden files” and “Scan external drives". 🔌 OTG-adapter: Connect SD-map OTG-cable (if you have a card reader) The phone recognizes it as an external USB-The storage device and the gallery will have access.
For advanced users:
- 🐧 Termux: Install Termux from F-Droid. execute commands: termux-setup-storage ls /storage/EXTERNAL_STORAGE_ID/ (where EXTERNAL_STORAGE_ID — identifier SD-map).
- 🔧 ADB: adb shell ls /storage/ adb shell am broadcast -a android.intent.action.MEDIA_MOUNTED -d file:///storage/EXTERNAL_STORAGE_ID
- 🛠️ Manual editing build.prop (for experienced): Mount /system In the write mode (root required). Open the file /system/build.prop and add a line: ro.miui.has_real_blur=1 ro.miui.has_handy_mode_sf=1 ro.miui.sdcard_notify=true
After flashing:
- Do not restore data from MIUI backup – this can bring back old bugs.
- Check the work first. SD-card-on-the-clean-system.
It'll delete all the data on the map!