What should I do when this message appears?

[yong]

I write using a translation program.

An external HDD Drive is connected to the computer.

But it says to format it.

I want to use it again without losing any data.

In disk manager it says RAW drive.

Scanned using R-Studio.

But This message appears.

Select the scan command from the drive menu to find all partitions that have ever been located on the selected disk or double-click a logical disk to enumerate its files.

What should I do?

[Alt]

You need to scan the disk. Disk Scan.