Recover Data Files, Unerase Files

this is a review on how to fix and recover bad sectors on a flash drive/hard drive with windows

• How do i retrieve the data from a folder in a flash drive which is rendered corrupt or unreadable.?
• can i still recover my files in my corrupted flash drive? I just insert it and i found my flash drive 0 bytes?
• How do i replace my old internal hard drive with a new one? im getting errors!!!?
• How near to impossible is it to recover data from a broken flash drive?