Can not copy files into usb

[saif1998]

I have 16gb sony pendrive and using windows10.
I used my pendrive previously wel but now i can not copy files into my pendrive but i can copy files from it.
I tried to remove remove write protected from registry editor.but not solved.
Then i tried by command prompt by this way
1. diskpart
2.list disk
3.selected entered disc no and entered
4.then attributes disk clear readonly
But then at last line showing no disk selected ‚ select a disc.

Please help me to fix this problem.
I can not format it also.

 

[GreyCatz]

It seems that Sony have some serious issues with Windows 10 compatibility going back to June 2015 (and even further back with Windows 8x). On this page, they acknowledge such issues:
https/sony-paa-pa-en-web--paa.custhelp.com/app/answers/detail/a_id/171222

They also instruct users to visit the Sony support page for their relevant country, but as you can tell from this discussion on Sony's forum (India):
http/www.community.sony.com/t5/Other-Products/Sony-pendrive-not-formatting/m-p/640676/highlight/true#M9834

... the issues don't seem to have been resolved as of July this year (2-and-a-half years later). This thread from February 2013 is the closest I've gotten to an actual solution:
http/www.community.sony.com/t5/Other-Products/HOW-TO-FORMAT-OR-REMOVE-WRITE-PROTECTION-FROM-SONY-USB-PENDRIVE/m-p/68909/highlight/true#M2874

Be aware that this thread doesn't mention any OS (I'm guessing Win8.1) so I do not guarantee the solution offered will work. All other 'solutions' on this forum only instruct users to contact Sony.

Sorry,
GreyCatz.