Syncios iOS manager, a free management tool for all smartphones, supports backing up your iPhone data to computer easily and efficiently. Besides, it enables you manage, create, edit, delete device contents straightforward and one-click backup> resotre your iPhone, so if you want to backup your data before cleaning up your phone, it can be a great alternative. There are more features on its toolbox, like making ringtone, downloading Youtube videos, convert music and videos etc. Truly a trick. Simply install it on your computer, worth a try.