Add secondary drive in steam

[kisun]

If you reformatted it to ext4 I would suggest to follow @omano advice and make a fix mountpoint for your disk. So the disk is always visible after starting your system.

Please take a look in here:

[root tip] [How To] Mount partition using fstab

Make a permanent mountpoint. Linux Foundation Refererence The FHS document has a limited scope: Local placement of local files is a local issue, so FHS does not attempt to usurp system administrators. FHS addresses issues where file placements need to be coordinated between multiple parties such as local sites, distributions, applications, documentation, etc. So for the sake of this article there is no standard as we are talking about Local placement of local files is a local issue and…

After your disk got a fix mountpoint and the right access rights steam should not have problems to reach it.

… one question still … you use the steam installation which came with manjaro … not the flatpak, right?