Somehow one of my tablets started playing up last night. It stopped recognizing the installed micro SD card which has quite a few of the applications stored on it. I tried all sorts to no avail.
So today I reset it to factory settings and in the process as is the normal process erased all data and applications which were on it.
I did spend quite some time today from scratch reinstalling most things. Everything is back to normal as far as I can determine.
It is nevertheless a bit annoying and costs a fair amount of time. Good thing I had nothing else urgent.
The joys of computing