My 4 & 16 GB pendrive problem

4gb pendrive not open no format

16gb pendrive problem
write protection and format write protected not remove

No format pendrive
Not video delete
No other files deleted & not copy

Plz solution

if it is in write protected they will need to be replaced. contact sandisk support to check warranty status. 

What type of computer (mac or pc) are you using,

Can you provide screenshots of the issue?

Are they older pendrives or recently purchased?

I am using pc

I am using Windows 7 pc

just format this device and your problem will be solved according to me. 

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Sandisk pan drive 3.0 not canated pc windows 7


16 GB pan drive