In order for Plex to read or locate your media files on another hard drive you must create a mount point. Actually, on my desktop system I installed the Plex Media Server on my SSD and my Movies and TV folders on another internal hard drive. You don't have to create those same named folders or place them in the same location. To create these folders enter the following in your Terminal: I will create a Movies folder that will contain all my movies and a TV folder that will contain all my TV shows. In my example I will create a plexmedia folder in the opt folder (a folder not part of the operating system) and create two folders inside the plexmedia folder.

You need to create folders that will reflect the type of files that will be placed in them.

Viewtopic.Before you start the Plex setup wizard let’s create the directories that will store the Plex media files.

NTFS Partition does not activate even with automount, until clicking drive in file manager - Linux Mint Forums This link below has instructions for using 'Disks' with any installed file system. It really does help if the external drive's partition has a human readable volume name rather than some cryptic volume ID alphanumeric reference. You can easily use the 'Disks' application to do what 'smurphos' instruction show manually.

I found that Plex does not like the default 'mounting point' that Linux uses of '/media/YourUserName/Drive-Partition', but if you use the '/mnt/Drive-partition-label/' folder, then it works well. What files system is the external drive using, Fat32, NTFS, Linux ext4, exFat, etc.? The instructions from 'smurphos' should have worked. With the exteernal drive attached, if you run ' inxi -Fxzd' and ' lsusb' from the console terminal prompt, highlight the results, copy and paste them back here, that should provide enough information. It would help to know more about your system setup. I just read your post and the good replies to it.

Ubuntu plex media server permissions