New ebay seller pepegambra has listed the fake 64GB Sony flash drive shown above on ebay in Spain. The seller may be unaware that the item is fake capacity. Sony do not currently make any 64GB flash drives. These are produced by fraudsters in China and are not 64GB – the real capacity is much smaller. These drives are designed to fool the operating system (and therefore the user) into seeing them as 64GB but the actual capacity is generally less than 1GB. The net result of this is that users eventually lose all, or almost all, their files.
If you bought one of these you should test immediately with h2testw.
Report in to SOSFakeFlash if your testing confirms you have a false capacity device.