My bad about the other day. The trick is using multiple accounts.
Most people have more than one account running similtaneously. Say they have 5 accounts. They back up the data then send the car to the 2nd account. Restore data on first account then repeat the process on all the other accounts. Next day they have 5 X1's to send and they keep the original (sent back to 1st account from the last account). Some people are using 2 PS3's as well so they can send even more cars.
OOOhhh. So technically you CAN ONLY send one per day from each account. But if you have x-number of accounts, you backup/restore from each account? Looks like I'll either need multiple USB flash drives, or just mark the backups on the computer and keep them named the same as the account names. Is that correct?
You cannot use your save data for another account. basically, create a new account & get the car sent there. this way, that accounts only purpose is holding the duplicate cars for trading 👍