Show us screen captures. We need to see both the view of Lightroom, and how the photos exist in your operating system.
If re-connecting in Lightroom isn't working as you expect, show us screen captures of that as well.
Here is a screen shot of the disk directory structure. Basically Batik 2 -> Photos -> Iceland. Iceland is one of many folders in Photos. Directory structure was created by adding new folders WITHIN Lightroom
Here is a screen shot of the directory structure in the left panel of Lightroom's Library module. Note that 1) there are now 2 Batik 2's. The original -- actual -- disk is on the top. Note the question marks on folders. The second Batik 2 is the new one created by Lightroom where I choose to merge a small folder, plus some others, possibly from the work in progress when I disconnected while previews were being made.
Here is the find file dialog box I got when I tried to relink from the !. I never got this before. Two Batik's one with a red minus sign
When I tried to go to the second (yellow) Batik to make a screen shot for you Lightroom told me there were no photos the directory and all of the photos disappeared from the library (they had been there with exclamation points a moment earlier).