when i copy something from pc to micro sd will get the error like this > the disk is write-protected, and cant copy things to that micro sd.

What i have to do for it? format?

I ve this kind of problem also. Sometime it will work. Pull out the card and insert again. Or check with other pc. It puzzle me is, the MMC card got this message?? What I know is, MMC don't ve write protected.

Hehe is the time that show me is smart ( kidding )
i know why write -protected.
Solution here > For those guys who use card reader for pc, please install the card reader driver. Most of ppl is let the window auto detect and direct copy file, after u turn off and turn on again it will protected ( else you really turn the adapter lock, then sure be protected ). After you install the driver, the window will detect by the driver to your card reader, then will no write protected at all.

I do like that ^^

My problem with write protect error is due to faulty sd card reader, the write protect pin have problem so got this error, try use different sd card reader.

there's a white switch beside the memory card, just push all the way up to unlock it

Humorboy that swith i push it to unlock all the way.
I also got 1 solution that i try. After i install the reader driver. Sometime will get protected error.
The another way to do is, first u slot in your reader first, let pc detect the reader then only slot your mini or micro sd in the reader.

Try try ^^