Unable to use new SSD expansion drive

I recently bought a 4tb Samsung T7 Shield drive from ebay as an expansion drive for my laptop. When I plug it in I can hear that Windows has recognised the disk is there but can't see it in Explorer, and there is no drive letter for the new drive.

When I look in Disk Management (see screenshot) it is shown as disk 1 with 2 partitions of 200MB & 3725.83GB. I am unable to do anything in disk management as all drop down menu options are greyed out.

When I look in Diskpart it shows Disk 1 as being on line and that it is 3726GB in size, but when I use 'list volume' (see second screenshot) I'm not entirely sure what it is telling me.

Can anyone explain what I am looking at and tell me how to fix it so I can use the drive. Please be gentle in any replies as I am a computer numpty.

** UPDATE** I've managed to use the 'clean' command and the 200mb partition has disappeared leaving me with Disk 1 showing as '3726.01GB unallocated'. Again I don't know what this means or what to do next.

I have two 4TB Samsung T7 Shield portable SSD drives. Before using them I did a Quick Format on each giving them unique names so I could tell them apart.

I use them as storage for my nightly Macrium Reflect image backups. I have no problem using them or seeing them in Microsoft File Explorer.

Thanks TraderGary I have other T7 Shield drives that worked straight out of the box with no problems. This one just refuses to behave!

You might try doing a Quick Format on the drive to see if that fixes it.

SOLVED: I managed to convert the 'unallocated' drive into a new 'simple drive'. This gave me the chance to allocate a file system & a drive letter, once that was done I was able to format it. I now have 4tb of pristine storage available to me!

Having purchased the drive on eBay, there's no telling what the previous user had done with it. I'll wager a format would also have fixed it.