• I have searched to see if a similar issue already exists.

Our specific problem is that we need to select zarr and ome-zarr structures which are basically folders with a nested structure of folders and files. Our specific need is to select a single folder.

Current gradio solution is to open the folder and click "." folder:

I had to got through the issue #9835 to figure out how it works. This solution is very unsatisfying, bordering with blocking the usage of gradio. The fact that a user and a developer of gradio (I am assuming its a developer) both missed the fact that you have to click the inner "." folder proves my point about how intuitive it is. I apologize if I am wrong and just didn't find the proper way to do it.

Also another problem arises as mentioned at the end of the #9835. If you let people to only see folders, it is not possible to select them.

I suggest switching the behavior.
For file_count="single" you have a checkbox next to a folder, if you select that, it will only select the folder.
For file_count="multiple" the behavior of the checkbox doesn't change, but you gain the option inside the folder to select everything (instead of the "." folder/file/option).

This leads to

1. more predictable behavior as the checkbox behaves the same for both files and folders
2. preventing undesirable behavior like the post at the end of #9835 where you can not select a single folder if you display only folders.
3. Better user experience as choosing one folder is definitely more usual case than choosing all contents of a folder