These Nuvi's are not famous for Quick Map Redraw the 1300 is also sluggish.
Some Tips.
Install only the Map tiles That you need.
Remove Dem maps from unit and SD Card.
Remove all unused Maps from Unit and SD Card.
Remove all JCV files from Nuvi and SD Card.
As Kunix suggested. Remove Unused files from Nuvi. (Voices Texts etc etc)
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