OneDrive Synchronisation has dumped dozens of items on my Lock screen

Two days ago, I powered up my laptop and there was a message "OneDrive is starting to back up your files" It finished 18 minutes later but left dozens of items on my Lock screen, shown in the photo below.

I tried to use System Restore but that caused more problems: (1) it won't let me restore to a date prior to OneDrive's damage and (2) it will only allow me to run System Restore manually, as which is useful as a chocolate teapot.

I've created new threads in the MS Community so I mustn't double-post here.

What I'd really appreciate are your views on whether or not I need to have to have One-Drive installed.

I never take my laptop outside of my house (especially nowadays, with Covid19 lockdown rules) and the only possible benefit I can envisage is if my laptop gets stolen - which is most unlikely.

What do you think?

version 2004, OS build19041.572