Write protected drive

hi everyone!
i am new in this forum and i am facing this issue since a few days ago. i recently gave my pen drive to a friend in order to copy some files from it to his laptop but since he copied the files and gave me my pen drive back i started encountering this problem saying (the drive is write protected). i hopefully went online and searched for solutions like (regedit) process and when i go through that process and i reach the (system) part and expand it , i don't even see Storage...policies at all. still none of them worked for my 32GB Sandisk USB drive. please can someone help me get back the drive working? i will be very grateful thanks . please never mind my english cause still learning it.