What I’m after is a way to navigate a directory structure in a single pane, where the listings come from two parallel sources. The goal is to split my data between internal storage & NAS, but view it all combined, just by browsing one directory structure. I envision it looking like a directory listing where "externally sourced" items are interleaved in the normal listing, perhaps indicated by a different color or something.
Note that this is very similar to Filezilla’s File->Synchronized Browsing & File->Comparison, except:
1) The results are shown interleaved in a single panel, not dual-pane, and
2) It should work even if the full identical directory structure isn't on both sides. In Filezilla, Synchronized Browsing only remains active as long as the identical paths remain available in both panes; if you navigate into a folder i.e. on the left where no such folder exists on the right, Synchronized Browsing gets disabled. In my usage, navigating into a folder that's "missing" on the other side would simply result in no supplementary file entries being taken from that side - but if you back up a level and then navigate into a folder that IS there on both sides, you’ll see files from both again.
Could something like that be possible?
