The "on demand" mode (with .bts links) is a great option, but not always ideal. For example, I don't always want to even SEE all the files in a share. If someone has shared a folder with me and I'm only interested in one subdirectory, all those .bts files are just added and unnecessary noise. It's also kinda confusing that when you delete a synced file, it is replaced with a .bts file, instead of actually deleting the file. To delete a file, you have to delete it twice. I haven't tested, but I can imagine that this might confuse some apps where you delete a file from within the app, the app deletes it from the file system, but the file is still shared to all other devices and a .bts file is still on my share. A traditional "selective sync" option (like Dropbox) would be an excellent option in addition to "on demand". It should behave just like "always/full/auto" sync mode, but with some exclusions. Anything that is excluded (either specifically or by glob pattern or regex pattern) simply wouldn't show up in the local share. But everything that does show up behaves just like any other file.