I'm using the Telltale version, not the one from Steam.
After downloading Episode 2 (there were many disconnects and incorrect display of percentage) I noticed, that the data is not installed in the program folder of the game, but in 'my documents'.
I use different hard drive partitions for the OS and programs. That's why I don't have too much free space on that volume (about 5 to 6 GB).
So I tried moving the content of the data folder in '\Telltale Games\The Walking Dead\SyncFs' to '' and it worked perfectly well while I was offline.
But as soon as I got online and launched the game, the download of the 101 patch and the whole 102 episode started again.
How can I set up the game to anytime use the program folder for program data and 'my documents' folder only for save games and settings?
If that would not be possible, at the end of the season we would have about 500 MB used for the program folder and 4 GB in the save folder.
Just before posting this thread I had another idea to solve the problem and it worked. But it it's just a workaround and may need a bit experience with computers. I created a junction from the save folder to the program folder.
I still think TWD should work like this without the need of that workaround. Would be nice to get it as native behavior.