Thnak you, here are some answers : 1. Right now just chose something that made sense, need to test more 2. just randomly choose 7 chars a..zA..Z0..9 3. yes usi

Thnak you, here are some answers : 1. Right now just chose something that made sense, need to test more 2. just randomly choose 7 chars a..zA..Z0..9 3. yes using both. right now still not looking into metrics 4. not sure, i'm using flowjs which is a library that supports this need to test further 5. I don't think files are compressed before upload.