I have iPhones and iPads (use one of each). BUT...it seems I *may* be wrong about the source of the issue--it may not be the iOS app that is the problem, but rather the Desktop application instead. I had been trying all versions of 1.4, which appeared around the same time as iOS8, and today after reading here about people unhappy with 1.4, I uninstalled 1.4.99 and installed instead, to my WHS2011 PC, the last version of 1.3 namely 1.3.109. I need to do more testing to verify that updates to the synced folders result in proper updates to my iOS gizmos, but at least 1.3.109 worked great with my iOS8 apps 1.4.103 to get all the files to my devices w/o hiccups. 1.3 is a little more fiddly than 1.4, but has the advantage of WORKING!!!! Maybe Robson the difference is your NAS vs my WHS2011, which is 64-bit Windows very similar to W7 (no I haven't tried on any of my W7 platforms lately but I recall that early on I used 1.3 with a W7HPx64 machine and it was just fine.