How to mount an existing usb drive without formatting?

I have setup a new nextcloud running on my Raspberry Pi Debian OS. On the raspberry pi I attached a usb harddrive that previously was used in an earlier nextcloud project. I therefore cannot format the usb harddrive, since I need to make the existing data on my usb hard drive available.

I remembered that before when I used next cloud, it was possible to specify a mount point. However in the current Nextcloud version 25 I no longer can find a mount point in the settings.

Nextcloud version (eg, 20.0.5): 25
Operating system and version (eg, Ubuntu 20.04): Raspbian version 11

Here you go. Mounting is done at the filesystem level first.

Depends on if you installed NextcloudPi, or whatever other method. You notably skipped filling out the support form. Hopefully the guide above answers your question.