I'm trying to clean up some space on my iPhone, for this I need to sync it with a new Mac. The Mac doesn't have the files on the device, so sync will erase everything on the device. So I want to backup first, and then sync. But the backup complains there's not enough space (where? Mac has 55GB free). Errrrr. Pretty stuck here!
This is the message I get from iTunes (18.104.22.168) when trying to manually backup my iPhone 4S (iOS 8.1.2) to my Mac (Mac Book Pro Yosemite 10.10.5).
This is what happened until now:
- Last sync was on another computer (old Windows laptop), this is the first time trying to backup/sync on this Mac
- iPhone is full (I want to backup the data and then to cleanup)
- Mac has 55GB free space
- Backup wouldn't start, reported not enough space (a different message!) to sync
- Cleaned the lockdown folder as suggested by Apple
- Backup had started but reported an error about a "session could not be started"
- Restarted the device while connected to Mac (as suggested on some forum)
- Backup had started but reported this message ("iPhone XXX cannot be synced because there is not enough free space to hold all of the selected items.")
EDIT 2017: I no longer use this phone, eventually I didn't find a solution.