Hi,
Many thanks for your response, time and concise information.
Taking your advice, I shall –
1. Keep the battery connection clean with cleaner more often, as I find this partially successful.
2. With regard to the System folder and Mass Storage Mode, these items are a little beyond my capabilities ...

Hi
Thanks.
Yes, the internal battery on the zumo 590 has never been very successful from the start of ownership and on a few occasions found it unexpectedly flat.
I have noted from our forum it has always been major fault of this unit and instead of adjusting the pins, I spray electrical cleaner on ...

Hi
Many, many thanks for your response, I believe you have answered my queries.

The reason I think I should do a master reset is that my zumo 590 went into an involuntary reset in the middle of rideouts and believe that there is a glitch? This first happened 2 years ago when switching on the unit ...

Hi - thanks for your response that after a master rest maps on the SD are not deleted.
That has answered part of my query - great.
What about routes and music on the SD card - will they be deleted?
And my last query will "added map themes" be deleted?
As written above, my unit is the 590 that has a ...

I need to do a master reset on my 590 and aware of saving favourites etc.
Having completed an excellent customised map theme download from our forum a log time ago to improve the screen layout, I do not wish to lose it following a master reset.
Does anybody have an answer, which would much ...

Hi - Just had the same problem again - had the 590 several years and used regularly - and this has now happen twice this year and only twice before - there seems no reason why this has happening - its happens whether I turn on the unit or turn on with the bikes ignition - its most annoying since you ...