When using PhotoBackup for iOS on my iPhone 5s, I received the following error:
rsync: write failed on "/root/Pictures/100APPLE/IMG_0640.MOV": No space left on device (28)
This happened on my first sync between my phone and a WDMYcloud NAS. I know I have plenty of space left on the NAS (2.9TB free). Is there a certain amount of free memory on my iPhone required to sync?