With my garmin it came with lifetime updates of maps and speed cameras, usually I try to update it at least 2 or 3 times annually so that new roads that have opened then show up, I think when you update it it wipes it and reloads the info so I suppose that’s much the same as formatting it, also sometimes it’s taking longer to boot up and find the satellites so a forced stop where you press the on off button and keep it pressed until it goes off then switch it back on with the button held in, seems to do much the same as a reboot, sometimes it helps, other times not, I use mine continuously for up to 10 locations per day so it needs to work well and I’d never buy one that doesn’t have a reliable speed warning, I’d soon have no license.
BP