camera connector, external HDD, works then crashes-advice?

[168matchking]

Im using ifile and SBsettings to play music off my desktop HD. Works for awhile, then crashes iPad. At first I thought it was a spin down issue of the HD, but after using a couple of HDs, I think its a setting in an app. Been all over looking for similar issue, close but no cigar. Is it equipment or operator? Help please???!!!