Help accessing removed drives

Hello hive minds… I have an EX4100 and have upgraded to 4 12 tb drives, I did it raid 1. for drive 1 and 2. i transfered all my data using slot 3 and 4. Once complete I put in my other 2 drives and followed the procedure to add them to the raid system… and it formated all 4 drives.

Now HOW do I access the data that is on the 4 drives i have removed from the server so i can transfer it back on again.

Thank you for any help you can provide

clone them to the new drives