Check for a physical write-protect switch on the thumb drive and turn it off
Try a different USB port or another computer
Open Command Prompt as administrator
Run `diskpart`
Run `list disk`
Run `select disk X`
Run `attributes disk clear readonly`
Run `exit`
Open Registry Editor as administrator
Go to `HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlStorageDevicePolicies`
Set `WriteProtect` to `0`
If `StorageDevicePolicies` does not exist, create it and add a `DWORD (32-bit)` value named `WriteProtect` with data `0`
Open Group Policy Editor
Go to `Computer Configuration > Administrative Templates > System > Removable Storage Access`
Disable any policies that deny write access
Format the drive if needed
Use the manufacturer’s utility if the drive has one
Check for malware or security software blocking writes
Replace the thumb drive if it remains permanently write-protected