@llaffer:

True enough, but we do know backups rely strictly on cIOS so I figured not the issue. Mauifrog in fact had at one time removed every single IOS except System Menu and cIOS and backups ran without issue. Apparently based on CJ's back and forth, we can chalk this up to a USB HD compatibility issue. It's probably a USB3.0 device, those seem the most prone to traditional V8 (whereas the V9 betas at times do have better luck with USB3).