Kurt Whittemore+issues

I am looking for a free wiki hosting service allows me to import and export the wiki as text files?  I don't want my wiki to become trapped in a website I may not use later.  I also want to be able to transfer a complete wiki (as text files) into a new service if desired.  I keep my own personal wiki on my local computer as a folder of text files.  I can search these text files and also designate links to other text files by putting brackets around words (they are not clickable of course).  I would like to be able to import these text files into some wiki hosting service so that each text file becomes a page in the wiki and the links (words with brackets) are clickable and functionable.  Does your wiki hosting service provide this functionality?  If not, do you know of one that does?

Even better, it would be great if there is some wiki hosting service that allows the wiki to be synced with your local drive.  However, this might be asking for too much right now and is not necessary for my purposes.

Thanks for any help and information you have to offer me!

Best,
Kurt