I have a WD 1TB USB External Hard Drive that was accidentally formatted. I had formatted the disk and started writing an ISO to the disk (less than 5 seconds), when I realized it was to the wrong one. The disk had 2 partitions, one is FAT32, the other is HFS+ Encrypted. The FAT32 partition can be lost, however the HFS+ Encrypted partition has data that I need recovered. Also, I know the password to the HFS+ Encrypted partition that was lost.
I have tried using EaseUs Data Recovery, Stellar Phoenix Macintosh on Windows, and Prosoft Data Rescue 4 to no avail. People online have mentioned TestDisk and PhotoRec, however I am not familiar with how those work.
I would copy my USB hard drive before attempting any restores, however I do not have a spare 1TB hard drive lying around. Is this something I should spend money to buy?
I would appreciate any help and advice you can provide.