I'm back with updates.
It turns out that my problem was exactly the one you were having, @CNK. Kudos for your post! It was already there, waiting for me to put it into practice.
I cannot thank you enough, this issue was messing really bad with my online folders (Google Drive and the like), specially because I was so confused with due dates and records (modifications on documents and such).
@patrikg, I'll keep your links. Is always a good thing to have them and get a more deeper understanding of Tiny Core.
Thank you to all!