Domanda rivolta a Juan Antonio

Hello @Nicola_Imperati
you mean this extension:

you can convert the entire TinyDB to a text file.

You can also convert the TinyDB into a text file using blocks without extensions:

I don't understand what you want to do. If you have a TinyDB and you want to create a backup in the same app, copy the entire TinyDB and another TinyDB_backup.

If you want to have a backup outside the app, you can save it to CloudDB, FireBase, GoogleDrive.

You say it has a single tag with 457 values, how size are all values?