New workdrive not recognized

[Shop5FEB]

How to add new workdrive?

I go to 'preferences '=> 'workdrives'

I see the drive I'm using now. The one that's out of space.
I'd like to add new workdrive. But my other drive doesn't show up.

How can I add new workdrive?

[J453]

Does Photoshop have full disk access?

[Shop5FEB]

Thanks for replying!

No, Photoshop hasn't.
Thanks for noticing, this could be the fix.
However I am in doubt. Mail, Messages, Safari, Home, etc. that's a lot of permission.
I just want to use Photoshop and have it write files onto a separate harddrive, withouth giving it an VIP-permission..

Any way I could just do that? Connect it to another drive without the VIP-permissions?

[c.pfaffenbichler]

How is the drive formatted? 

https://helpx.adobe.com/photoshop/using/scratch-disks-preferences.html

[Shop5FEB]

Ex-fat

Thanks for your reply!

[J453]

Use APFS.

ExFAT is unreliable on current versions of macOS: https://helpx.adobe.com/photoshop/kb/photoshop-and-macos-catalina.html 

[J453 · Accepted solution]

Also: https://helpx.adobe.com/photoshop/using/scratch-disks-preferences.html 

Supported drive formats for scratch disks

macOS:APFS or Mac OS Extended (Journaled)

[Shop5FEB]

Thanks for the hint.
So I bought a new hard drive. Once received, I will format it APFS. 
I'm not good with computers, so thank you for you help, much appreciated