Can't use nor format memory stick

[lewis82]

I bought a Memory Stick Pro Duo on ebay. 11$ for 4GB, it seemed too good to be true. It was.

The camera took a while to boot, and then said "Format Error". I tried many times to format it manually, with the same result each time. I then tried to format it with my MBP, but the computer didn't even recognize the card. In System Informations, I could see the camera, but not the memory stick.

As a last resort, I put it in a PC, using a Memory Stick (the old ones) adapter. The PC saw the adapter, but not the memory stick.

I managed to get a refund, but before I throw it away I figured out I should ask what to do here. Any ideas, or is this memory stick only good for the garbage?

 

[r.j.s]

What camera? Have you used any other cards over 2GB?

How old is the adapter?

 

[lewis82]

The adapter came with the Memory Stick. It supposedly is a Sony card, but I highly doubt it, considering the price.

The camera is a Sony DSC-S730, and according to Sony, it should support it, as long as the data doesn't require Magic Gate (which I'm sure is the case with the photos I take). However I have not tested a 4GB card before, I have a Sandisk 2GB.

EDIT:http://esupport.sony.com/CA/perl/support-info.pl?&info_id=12&mdl=DSCS730