I have a similar problem with an external USB HDD like in this topic RAW drive with an unrecoverable partition. However I get nothing out of it

My problem is as follows:
My System:
1.
• External HDD
• Seagate Backup Plus STCA4000200
• 4TB
• USB 3.0 + AC Adapter
• NOT encrypted
• Original Drive Letter H:
2.
• Windows 7 Pro
I use this HDD as Backup and at the same time partially as storage for daily use.
Yesterday I wanted to make an image of a PC with Acronis True Image Plus Pack 2013 and save the image just as file (.tib) on this HDD.
!!! I'm definitely sure that I didn't recovery any existed Image on the USB HDD, I wanted just backup a tib-file to the USB HDD !!!
I started the backup. After several minutes True Image didn't go forward, so I tried to abort the process, but it didn't abort completely.
Then I unplugged the USB cable of the HDD and started True Image again.
This time True Image didn't recognize the external USB HDD correctly.
It shows the folders, but the files are missing and it can't make backup .tib file.
Now, when I plug the HDD on the (original) Windows 7 machine, it says the HDD has a RAW format and should be formatted.
The HDD is in Disk Management Tool of Windows 7 shown but as a RAW Partition (Disc).
Furthermore the HDD has no name and no capacity empty/used anymore according properties of the HDD.
So tell now I tried with testdisk several tests, but none of them gave me any information about the lost partition, so I couldn't recover the partition table of the external USB HDD yet.
I tried also many guidance in this forum and searched in google, however I had no luck with them

I'd be glad and very grateful to you if you could provide me with some tips, how and what should I do more, in order to recover my disc once again.


Attached you find some screenshots of my attempts.
If you need further information please let me know.
Thank you indeed in advance
Best regards
Thomas
PS: Is it possible to upload many pics in this forum?
Here you find the pics on abload.de




I'm not sure why I get this Linux partition, but I think it comes from True Image since it's based on Linux.















