Unwritable 8GB Class 10 microSD

[sayarsoft]

Hi, all.

I have a Sandisk Ultra Class 10 8GB microSD. When I plug it into my laptop with a microSD adapter, I can not write on it.

When I try to copy a file on it, the write operation seems ok. But when I replug it, I can not see that file.

I can not erase partitions. I can not format. Whatever I did is no go.

It looks like it is in some sort of read-only mode.

Is there any low-level tool to check what is going on the card?

[drlucky]

it sounds like the card was went into write protected mode. The card will need to be replaced. contact sandisk support to check warranty status. 

[sayarsoft]

Thanks for your reply drlucky.

Card is rather old, so no warranty anymore.

Is there anything I can do to turn it back to write enabled mode?

Does it mean flash chip on the card is somehow damaged and therefore sd-card is useless anymore?

[drlucky]

No, once the card locks down in write protection it cant be removed.

the ultra cards have like a 5 or 10 year warranty so it may be worth checking the warranty status with sandisk support.