Having sorted out issues with Touch Screen, power supply. When running a 3B/3B+ require power separately too both the Pi and Touch Screen. Failure to do so can cause corruption of file system, which I found out the hard way. Now running with power supplies. for each.
Also had issues with https://volumio.org/forum/problem-with-volumio-data-not-expanding-t11656.html which have not been able to resolve other than manual intervention and continue.
Recently this week did upgrade too 2.555 which unfortunately did not work, ended up with a corrupted file system. Which resulted in need to install from scratch. On the upside using the 2.555 image to do install the file system expanded as expected, so that was good news.
What was not so good news is touchscreen failing to run properly after showing as installed. Have repeated install by uninstall then install again. This seemed to work the screen came up with the familiar Volumio page. However a problem showed up in that this screen showed a mouse pointer. Which impacted the touchscreen from working correctly. While this shows up the touch side is not working as expected.
This has been through one installation therefore have the log files via either /dev or copy off via SSh.