and if your done retrieving your files,photos and etc...you can reformat it.im sure you know how to plug your memory card...i hope so...then format it.here's how to reformat your memory card...
1. Plug your memory card into a reader the plug your reader onto your PC, mac or laptop
2. Open your my computer or windows explorer then find removable drive f...be sure not the c: or d: drive.
3. Right click and select format...
4. Under the format data you can see how much is the capacity of your memory card...
5. Select file format FAT not FAT32,FAT16 nor NTFS...
6. Do not check any under the format option then start!
7. w8 and your done!safely remove always your memory card or USB flash drive after your done!
8. enjoy of saving files and taking picture's and save to your memory card or USB good luck!