Accidentally formatted external hard drive after upgrading to 64-bit

Help! I tried to upgrade my 32-bit into 64-bit and saved my backup into my 1 TB external hard drive. Unfortunately, I formatted my external hard drive during upgrade and the file size shrunk into 32 GB. I managed to get back the unallocated space, and then I immediately tried installing recovery apps; hoping to recover my files but to no avail. Can a tech person fix and recover my lost data inside my external hard drive or is there another program/command that can get back my files?
 
So... what method/program did you use to backup you're OS/Files ?
I'm sorry but your description of your error isn't making much sense at all.
Show us your external drives contents with partitions.
https://answers.microsoft.com/en-us...t/04a8ef8c-c882-404e-a26b-89867c4ddf55?auth=1
Actually, by means of "backup", I copied all my files into my external hard drive. Then, I used the MediaCreationTool which then during my upgrade, my external drive was inserted and also the one that got formatted into a recovery drive.
 
Get a linux suse live distro DVD-USB drive ready.
Load the live dvd, hookup you're external hard drive.
Double click you're hdd and see if it will allow access.
If so get a 8gb or higher flash drive.
Take whatever files that is most important to you.
Anything else just wasting space leave it there for now.
Use easus hdd partition tool and do a full format.
Partition it to be a logical drive and that should be the end of it.
 
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