To get rid of this alert, you need to reset the lockdown folder (While upgrading to i OS 8, you will find it's impossible to sync files with i Tunes under the circumstance of Wifi mode.confirm the network settings in the popup menu If you still fail to sync with i Tunes over Wi-Fi, you can check, if the Wifi network is not stable, if your i Phone i Pad keeps dropping Wi-Fi, whether your computer or i Device is connected to a VPN, etc.
There is no music ever getting transferred even after several time attempts.
You can figure it out with the potential solutions as follows: Syncing music is one of the frequently-used features for i Tunes users.
To learn more about "Other", please refer to What is the Other and How to Remove it Unlock the device to confirm your i OS device trusting your computer.
If the trust alert pops up repeatedly from your device, please confirm you have installed i Tunes on your computer.
It brings a convenient way for users to manage and transfer almost all your i Device contents.