Strange files showing up on Memory Card???

[FishMD]

So, over the Holidays I thought I would take some time to install and try out a few apps for our Touch. I tried out SBP pocket plus as well as phone alarm and the s2u application. Well, I got rid of SBP just cuase I like to keep my home page fairly clean looking and this was putting too much on it for my taste. I have kept phone alarm and s2u up to now. They both seem to be working pretty well and have not caused any crashes or hang-ups.

Here is the thing though, I looked with file exp. at my memory card, and I am now seeing 13 files on there that look like this...
00000000 (except the 0 is really a box).

Each file has the date of 8/1/80 and is 16 MB and one has the date of 2.22.80 and is 1.15GB.

I have no idea what this is. It is only on my memory card. I don't think it was there before i tried these new apps. Whenever I try to delete it, it says it is a system file and that an application may not work if I delete it, etc..

Any thoughts. Sorry this is so long a post, just trying to be detailed.