Sandisk USB Drive being write-protected is an issue that has been faced by a lot of Sandisk storage users. This can be the effect of some corrupted file in windows or some Windows registry key is incorrect. Fortunately, this is not a serious issue and this 'write protection' can be removed without any trouble. This removal can be done in 2 ways:
1. Without using any 3rd party software: Windows has provided its users(actually for Windows developers, but is accessible by a normal user) a powerful tool capable of changing a number of things inside the Windows Operating system. The tool is called Regedit which is the short form for registry editor. So to remove the write protection from your SanDisk USB drive, follow the steps given below:
a) First, launch the run window by pressing the Windows key(the key between your ctrl and alt key with a logo of windows on it) along with the 'R' key i.e Win+R.
b)Type 'Regedit' in the search box
c)Navigate to the following key: "Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\
d)Double click "WriteProtect" and change the value from 1 to 0, then press 'OK'.
e)Restart your computer, and plug in your SanDisk Pendrive and you will find that the write protection has been removed from your pen drive. Now format the device. Now your pen drive is ready for its normal use.
2. Using 3rd party software: The issue with Regedit is that it will look complex for some users, and for them, we have many 3rd party software but EaseUS partition removal tool is the one that I prefer, because I have personally used many of their products, and all of them have worked correctly. You can head over to easeUs official website to learn more about their partition software. ( I have no affiliation with EaseUS, it's just my personal opinion).
I hope I solved your Sandisk write protection issue, and would love to see a reply if the above methods worked.
Deepak Mathews Koshy