I'm in Australia so hadn't come across Moby Memory until recently.  Previously, I bought a 1GB MMC over Ebay - for my Siemens SX1.  The phone recognises it, can format it, etc.  I've got a card reader and have also formatted via the PC.

My problem is this:  I format the card as FAT 16.  Then start dragging MP3's to it.  Once I get up to 250MB used or thereabouts, the card corrupts, and I have to reformat again. 

I've read that you can't have above a certain number of files in the root directory with FAT 16, but I'm moving them to E:\MP3\A\song name.  I also thought it was due to my long filenames - artist - songname, but the other night I tried renaming the file names simply to simple numbers, and have exactly the same problem - corrupts at about 250MB.

I don't believe the phone is part of the problem, it is going wrong before I even get it to the phone.  Has to be related to the FAT16 somehow right??  Since the card clearly shows as having 980MB available both on the PC and on the phone. 

So then my question is - if it's related to the FAT16, why would this problem not exist regardless of card manufacturer - given that they will all be formatted using FAT16.  I just can't understand why I would for example, be able to format your card as FAT16, then proceed to drag MP3's to it, and be able to keep going up to capacity of card.

One final thing - if I do purchase one of your cards, can you tell me if I will run into problems due to length of filename, or is the key thing to just make sure not too many files in the root directory??

Thanks.