partitioning - I want to recover my data from an external NTFS drive

I have tried testdisk to recover my lost data from my external disk. I've tried that and get the below message from terminal

Disk /dev/sdc - 1000 GB / 931 GiB - CHS 121601 255 63
     Partition                  Start        End    Size in sectors
 1 * HPFS - NTFS              0   1  1 121600 254 63 1953520002
Boot sector
Status: OK
Backup boot sector
Status: OK
Sectors are identical.
A valid NTFS Boot sector must be present in order to access
any data; even if the partition is not bootable.

What do I need to do next? I tried to install Ubuntu with a partition on the external drive on my laptop and when I went back to get my data the external didn't show anything.