The file type is 100% ".MD5 File". Confirmed "hide extensions for known file types" was unticked in view folder options.
Download this, and copy it to your backup folder. Then copy your backup to the backup folder on your One, and try to restore the backup.
nandroid.md5
---------- Post added at 09:45 AM ---------- Previous post was at 09:43 AM ----------
It's fixed feel like ive been to hell and back trying to get this working and CANNOT thank you all enough... And I will backup!
So FYI if someone else comes across this problem:
1. Wipe the SD card (save items first if you have them)
2. Reboot and install ROM manager.
3. Connect to computer and move the file to the /clockworkmod/backup folder (I did rename it to nandroid and made a new nandroid.md5 file)
4. Opened ROM manager and went to restore and choose "nandroid"
5. Re-installed successfully and OTA was working!
Thank you x 100000000000000000000
Nevermind, looks like you got it working.