Seagate 4TB External now showing as RAW/Corrupt

[Totempole]

I'm hoping someone here can help me.

Earlier today, I attempted to create a backup of my primary hard disk using Acronis before I updated to Windows 10.

I ran the program from a bootable CD, and plugged in the external. Everything seemed okay, until I receved a message that the destination drive was inaccessible. I rebooted the PC to find that it had suddenly become RAW file system and was inaccessible as a result.

In Windows Disk Management the drive shows up as RAW file system.

I tried running Acronis Disk Director's partition recovery. It shows the drive as formatted with NTFS (3.64TB Capacity, and 100% used). It was marked with a red "C" indicating that there is a problem, but it wouldn't do anything to fix it.

I've also run Minitool Partition Wizard, which also shows the drive as 3.64TB NTFS formatted and 100% used, which is only half right because I had used about 70% of the drive.

I'm not sure what I did to cause this, but I really hope someone can advise me as to what I should try and do here.

I don't want to do anything potentially destructive to the data, but I also can't afford to send it off to a data recovery company.

Any advice would be much appreciated, and please let me know if there's any further info I can provide.

Thanks.

 

[Totempole]

Easeus Data Recovery is what saved me eventually. It took 2 days to scan the drive, but was able to recover everything I needed.

I'm still not sure what exactly caused Acronis to corrupt the drives file system, but I haven't had any issues like this with Acronis since.

I reformatted the drive a month and a half ago, and it's still working perfectly.