The idea is to create the same flowcards i just created for Simple Log:
Export the variables (or Log in SL’s case) through flowcards (automated) as JSON, CSV or Excel (give people the type the need), as text or Base64 file, so the can uatomaticly save it every day.
In FTP Client i have already build in a new flowcard to save Base64 files, thus: You can save the Log/Variables every day on a FTP (on Homey itself for instance).