I know 3 ways
1- store to tinydb a list of list or a comma sepatated text
2- store a csv in ASD
3- store a csv in /Documents
What's the best solution in order to share data, if needed, with a pc ?
You are right, but that was not an open discussion by me.
For what it is worth, I will repeat the answer I gave in that other topic.
For simplicity, I would export the data to Google Drive (as a text or csv file) or to Google Sheets (as data). Both methods provide easy access to the data from a PC, and it saves fiddling about with Filescopes/SAF/Android File system.
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another solution is to send the csv file by email
Taifun
I like it, but how can I export to gdrive ? I have to store data in a file and share it or directly to Gdrive ?
Yes, I provided a link to a guide in the other topic, where you asked the same question. If you are already saving the data to a file in your app, then this solution is possibly the one to use.
Too complicated for me to access gdrive via web, I tried in the past but had problems with the script, I would like an easy way
http://ai2.appinventor.mit.edu.ezproxy.canberra.edu.au/reference/components/storage.html#Spreadsheet
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What do you think about this way ?
- Store data to tinydb
- upload csv file to gdrive via sharing component
- download file grom gdrive to pc
- if needed update file with pc and upload it to gdrive replacing the old one
- get file with web component and update tinydb
I had never thought about doing it this way, inspired 
(probably because I spend most of my AI2 life using an emulator with no signed in google account)
From your PC, you can either do this manually (delete existing, upload new file - with new file ID), or use the "Manage versions" option in the right click menu on google drive, which would retain the file ID.
This is a good solution for me when data are not important, but if data are most important (bank data) I don't trust gdrive, what's the best way for sendig data to my pc ?
Then encrypt it....
