Blackberry curve 9300 media card cannot be accessed due to fatal errors

SOURCE: I've only had this 16GB micro sd card for about 7

You can try contacting the manufacturer if you by happen to have the receipt and get your money back...I save all that stuff now in a folder cause quality just doesn't exist on anything anymore like it did 30 years ago. Take it back where you got it...even if you don't have a receipt, if you make enough ruckus, maybe you can get it exchanged. It's messed up about the data though...hopefully you had a second copy on your computer (backup?)

SOURCE: My scandisk memory card (8GB)

try
SanDisk 8GB microSDHC Memory Card with a card reader and check whether there is problems, and also try the card with other mobiles and find whether there are problems, if there is a problem we can understand that the card is destroyed , you can replace the card with other one now.

SOURCE: Blackberry Bold 9700: "Media card

Hi there,

You need to get a reader/writer like this one;
http://www.newegg.com/Product/Product.as...
I use this one because it support all the latest formats. Older readers might not read the SDHC (High Capacity) format and you don't nead that. Pop the reader into a USB port and the card will show in File Explorer just like a hard drive. Right click it and select Format. Go with FAT32 format for most storage cards.
Post back if it is not working we will be happy to help you.
Hope this helps.
Cheers!!!!

SOURCE: after i insert my 1

It sounds like in your situation that you may have a bad card. If you cannot get your card to mount to your phone for storage, I would try to find access to a pc that has an SD card slot that you can try to format it that way. If the card still wont format, your looking at a defective card and will need to purchase a new one.

You can find Micro SD cards here for purchase.

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&Depa=0&Order=BESTMATCH&Description=micro%20sd&IsRelated=1&cm_sp=KeywordRelated-_-micro_sd_card-_-micro%20sd