Right after the 4.00 update my Garmin 3597 became slower and laggy. Just this week it crashed and rebooted during navigation EVERY time I used it. I don't use any custom poi and I have my map on a SanDisk 16gb micro sdhc. The hard reset didn't help. I was wondering if there is a way to format and bring everything back to the original state (System included). I need this for work and I'd like to fix this ASAP.
Thanks in advance.
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