Many U disks, SD cards and card holders have a slider switch. By flipping this slider, you can write-protect or remove the write-protection settings. To remove TF write protection, please see below to learn how to remove TF card write protection.

In addition, some SD card sleeves used to hold TF cards also have a write protection function like the SD cards mentioned above. Of course, hard disks (hard disks in computers and mobile hard disks) also have this function. Check to see if the write protection is set. Just turn the slider to remove the write protection. If it doesn't work, remember to turn it a few more times to eliminate the problem of insufficient movement and poor contact.

What should I do if the U disk, SD or FT card (memory card) without write protection function and the above mentioned disk with protection function but the slider does not work prompt that the disk is write protected? There are solutions for this phenomenon:

Method 1. Use error correction commands

There is no doubt that the first thing to do is to use the disk detection and repair command of the Windows system to try to solve this problem. Please follow the prompts:

Open Run (shortcut key Win+R) → enter "CMD" → press Enter to open the run window (black window), enter "k:" (the colon is essential, K represents the disk drive letter that is write-protected, please update Change according to your actual situation), then enter: CHKDSK /F and press Enter.

Note: If your system itself is set to write-protect the removable disk, then this method is invalid (in the registry, discussed below). The system will prompt: The current drive cannot be locked. Because the volume has been set to write protection, Windows cannot perform a disk check on it.

Method 2. Modify the registry

As mentioned above, if you use the system's CHKDSK /F error correction command, the system will display: "This volume has been set to write protection." Then it is very likely that the "StorageDevicePolicies" item has been added to your operating system registry. We only need to delete it or modify it to remove the write protection.

1. Open Run (shortcut key Win+R) → enter: regedit and press Enter;

2. Find this directory: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlStorageDevicePolicies;

3. After clicking StorageDevicePolicies, you will see WriteProtect in the right column of the window;

4. Right-click on WriteProtect → Modify (M) → Pop-up window, change the number 1 in the space under "Numeric Data" in the window to 0.

Note: If you don't see StorageDevicePolicies then this method does not apply to you (although you can try to create StorageDevicePolicies and WriteProtect, but there is little hope).

If the above method cannot remove the write protection of the TF card, you can use USBoot software to repair it. See the tutorial "How to use USBoot to repair the TF card".

The methods mentioned above all have the risk of data loss, so users should be prepared. The process of repairing the TF card cannot be interrupted, otherwise the TF card may become unusable.