Software Will Not Read Files

[Bi-Polar Bear]

I had all my filles on a 250gig hard drive labeled G, and my regular dj files on a 250 gig hard drive labeled F. I ran out of space. I bought a 500 gig hard drive to hold both sets of files. Hoster refuses to read it, and also refused to read the original G drive. I rebuilt the data bases in the software for both drives.

Now the software will occasionally read the F drive, then it defaults to the G drive which it cannot read because it's not plugged in.There is no rhyme or reason to it's behavior.

What I need is for my 500 gig hard drive, which contains my karaoke files and my regular music files to be read by my Hoster software and my dj software simultaneously, and my G drive to be a backup to be used only if the F drive crashes for some reason.

The biggest problem is that the software will for no apparent reason read off the F drive but them default to the G drive and tell me it can't find anythng. This is because the G drive is not plugged in and in fact nothing is plugged into that USB port.

Please help, the software has already done this on the gig three times and cost me several hundreds of dollars in lost revenue.