Toshiba portable HDD wants to format

[kt29]

Hello,
My Toshiba Canvio 1TB HDD wants to keep formatting the disk every computer or device i plug it into.
What has happened? Can I fix it?
Any advice or help would be appreciated.

 

[house70]

First question is, can you access the data on that HDD? If you can, proceed further:
Back-up the data on another media;
Wipe the HDD using a low-level format of your choice (I usually use killdisk);
Format the HDD for PC use (Windows needs NTFS or FAT, Linux-based OS don't need any specific formatting);
Optional: restore data to HDD.

If you can't access the data, try again to access it from a Linux-based PC (Ubuntu, for instance) and transfer the data to another media.
Finally, if you have no important data on it, just proceed with the wiping etc.