Hello @Luiflm2 Im not sure why this is happening, it sounds like its getting stuck in the initial file upload stage, the importbackup.log is only written to after the initial upload. It might be worth checking the apache log:
/var/log/emoncms/apache2-error.log
Alternatively you may like to try the direct usb import script. Which may work a bit faster with your 2GB data size, see Backup module usb-import.sh script (beta) for full details.