Micro SD cards showing inconsistent amounts of used space

jimmy_coma

Honorable
Aug 23, 2013
10
0
10,510
Hi All.

I just bought two 128gb micro sd cards on eBay and have put a load of music on them both.

One of them says that 85gb of 128gb is free and the other one says 101gb of 128gb is free.

However, when I select all of the folders on these cards, and then call up properties, one says that the size of the folders is 6.64gb and the other says that the size is 5.82. Clearly something is not adding up!

Also, I've noticed a lot of empty folders on these cards where music should be. Have I bought dodgy cards? They are both Sandisk 128gb cards and looked perfectly genuine in the photos on eBay and once I'd received them, but I am aware that there are problems with these things...

One other thing, the transfer rate is very slow. I'm lucky to get half a megabyte per second from my hard drive to these cards. The transfer starts quickly enough but slows down soon after.

Thanks for your help.

Paul.