Sometime USB Drive lock wit write protection and you are unable to transfer data . There are some method that can fix your usb flash drive write protection
Fix from tool
Download USB Flash Driver Format Tool (Ufix-II).
Extract the “RecoverTool_V2.00.42_M1223 8CE.exe” from the downloaded file and run.
Click here to download-
Remove Write Protection on a USB
To remove the write protection, simply open your Start menu, and click on Run. Type in regedit and press Enter. This will open the registry editor.
The next step is to navigate to the following path:
Double-click the WriteProtect key located in the right side pane and set the value to 0. Go to the Data Value box and press OK:
Unlock a USB Drive
Many USB keys come with a switch that slides up and down to enable or disable the write protection lock. As a first step, we recommend that you verify whether your USB has this switch (normally labelled with a hold or locked option). If so, simply unlock the switch and attempt to write.
Another simple solution for disabling write protection is to simply ascertain whether or not your currently file is being viewed in Read Only format. If it is read protected, simple right click on the folder and uncheck the “Read Only” button.
There are many online recovery tools which are related to a specific brand of USB stick. For example, utilise the JetFlash Online Recovery tool to repair Transcend USB keys which gives the user the flexibility to either maintain stored information or the format key.