This video shows how to back up and restore an iPhone to and from an external drive.
due to the limitation of local hard drive capacity, backing up to external drive can save you space on your PC.
with the increase in storage size of iPhones, it is becoming more and more difficult to save everything locally.
here are the paths of the back up folders created by itunes :
Windows
if installed from Microsoft Store:
C:\Users\(username)\Apple\MobileSync
Exe
C: \Users\(username)\AppData\Roaming\Apple Computer\MobileSync\Backup\
MacOS
~/Library/Application Support/MobileSync/Backup/
