I'd like to get the first drive that reports unformatted so it has the correct partition information so I then can see if any of the data that was saved on the drive can be recovered. I have tried a few different recovery packages and none are getting as far as your Test Disk.
I have searched and found at least one thread where help was attempted to be offered for the 0xAA55 message on here:
http://forum.cgsecurity.org/phpBB3/usb- ... -t462.html
I will include screen shots of the first unreadable drive analyse shows the drive is only 64 mb (and should be 16 gb)and then a second of the drive that has the correct readable partition information. CHS 1946 255 63 (sector 512) Fat 32 Block size is showing as 16384
1st screen of Analyse results (with different if None is selected instead of Intel)

When I scan the 2nd drive I get the following:

Thank you in advance.