Default Google Drive w/ Titanium Backup?

Hello fellow XDA community!

I have no idea how to restore my app data with google drive using titanium back up. I backup my data before and it worked. I have 3 android devices, with titanium back up. When I sync to Remote Location: Titanium Back Up 4 on all three devices, only back-up using one device. The other two doesn't overwrite the previous/old data I had on them. I tried looking on youtube and google for tips. But to no avail, no luck. There doesn't seem to be a guide for how to restore using google drive. Please help, thank you again.
Current Devices:
OnePlus One

Previous Device:
iPhone4