'Loading ignores: permission denied' error on Linux (newbie)

Unfortunately, I already have some results and it seems like it’s how the USB drive is setup.

This is the error I keep on having:

Error on folder "syncpi_backup" (syncpi_backup): folder path missing

I had previously re-formatted my NVME_USB drive and selected the following Mount Options using Gnome Disk:

The USB is connected to the USB 3.0 port and I told it to mount as /mnt/NVME_USB. The problem is that the USB drive keeps disconnecting as I keep getting the ‘device was removed’ error window.

I’ve tried plugging it to the USB 2.0 port instead but then it’s no longer at /mnt/NVME_USB and it mounts as /media/datapi/NVME_USB, which is no longer the folder path setup with Syncthing, hence the error.

Should I re-do the steps from the screenshot above on one of the USB 2.0 ports instead and simply redirect the folder paths? I don’t understand why it keeps disconnecting in the first place as I would very much like to keep it connected to the faster 3.0 port.