Many thanks for your quick response.
1.- GRETL 2019c (MS Windows (x86_64) 2019/07/02
This problem has been around since long time ago and on all my computers.
2.-"usersr\JAJM-HOME\GoogleDrive\Econometrics,.. In the snapshot below you can find the full path.
3.- When saving a file and clicking on the folder gretl at the left menu (see the snapshot below) I find all those folders that I can not find using windows file explorer. Inside these folders there are two gretl files: "session.inp" and "settings.inp"
Hope this helps.