Hi, hope someone can explain or help me. I purchase a 32gb microSD card from ebay. The seller live about 5hrs from me based on the address. I had try format using cmd, window format, and even HP USB Disk Storage Format Tool - v2.1.8. all success but sometime when i plug in the 32gb it kept ask me to reformat. that was one problem. 2nd problem was, if i copy/paste a 4gb mp3 to the 32gb microSD and everything was successfully copy. if unplug and replug, it delete all the mp3 and only leaving 1gb in it. If i check on Properties of the SD card, it said 4gb used. However, if i highlight all the folder inside sd card, Properties said 1gb usage. it seem like the card can only take 1gb or less. Is the card defective?