I'll try something different next install, I swear.

https://slrpnk.net/post/35266038

Plasma is great. But it’s missing an important feature. Apps, such as backup or sync, cannot navigate to network shares, to use as a backup target. Dolphin sees the shares ok, but its important to backup. Windows lets most appa select network targets. Plasma should too.
I use Nixos, but my ssh mount and nfs and samba mount can be selected as backup path for kup.
Nice. Kup actually lets me see the Network. But then complains if I select a samba share. There is a popular bug report about this.

What do you use for backup?

Kup currently also does not satisfy my needs, but I am not sure what else I should use.