so on the bigger archives with ~50MB it takes 5 h or more until the progress is done and the next archive is started.

Can there be anything done to:

1. Show the progress of the installment of that specific archive, so that I know that apt-get is still working?
2. Can the process of updating be stopped and be resumed later? I stopped it once by shutting down Kali. Afterwards usb persistence mode wasnt working, so I had to set the USB stick up from scratch.
3. What can be done to make the upgrade process faster?