SD Card is read x2 the actual size

[BlackBeanie]

I have a ProMaster 4GB SD card but it is being read as 7.45GB in the computer. I use 3 different card readers on two different Win7 computers and in all occasions, it is read as a 7.45GB (i.e., 8GB) card even after formatting it anew in the camera. Have you guys seen this kind of error before?

I guess I can't trust this card anymore?

[Train]

Format it and see what it then says.

[fink]

How old is it? Did it ever read as the correct size? Considering how cheap they are these days I wouldn't trust it to store anything important and spend 5 bucks on a new one but I'd be curious enough to try to move more than 4G of data onto it and see what happens. You could drag and drop the contents of a Win 7 install CD twice for enough files to fill it up. Or 2 HD DVD movies etc.

[BlackBeanie]

Format it and see what it then says.

Already did, in camera, still say 7.45GB. Just Now, I formatted it in a Win7 computer, still says 7.45GB.

How old is it? Did it ever read as the correct size? Considering how cheap they are these days I wouldn't trust it to store anything important and spend 5 bucks on a new one but I'd be curious enough to try to move more than 4G of data onto it and see what happens. You could drag and drop the contents of a Win 7 install CD twice for enough files to fill it up. Or 2 HD DVD movies etc.

I have so many cards, I've just never paid real attentions.

OK, I copied 2 Win8 preview iso files and a batch of photos to it. It DOES hold 7.45GB of stuffs. I open the copied photos and they are just fine. So I guess it may be a 8GB card mislabeled as 4GB from the factory. Anyway, I still don't really trust it. Probably won't use it for photo taking but for temp. file storage only.

[Train]

That mislabling has happened before. So you got lucky.