EOS R7 won't format SD cards

[acollins63]

I have a Canon EOS R7 and i have 2 SD cards that when I’m trying to format them it says “cannot format” and one that has a “write protected”. Any recommendations on a fix??

[p4pictures]

Are these full-size SD cards, or microSD cards in an adapter? Using microSD cards in an adapter is a well known way to get all sorts of troubles.

Can you format these cards by putting them in an SD card reader and using a computer? I would try that and then if it is successful then try formatting them in the camera again. 

If nothing works, then it's possible the cards have gone bad in some ways - I'd recommend replacing them with good quality UHS-II type SD cards from one of the major vendors such as Sandisk, ProGrade etc.

[acollins63]

They are full sized SD cards. I bought them all in November. How do you format them on a computer? I haven’t heard that being done before. 

Thanks for the tips!

[March411]

acollins63, have you checked to make sure they are not locked?

[acollins63]

I will check that!