Internal Memory of MicroSD

Former Member
Former Member
When sending to my Zumo 350, should I copy custom routes and their associated way points to internal memory or the SD card? How do I know when the internal storage or SD card a nearing capacity? Should I keep the zumo as an MTP device or change it back to how it was when I used map source?
Thanks for any help in advance. I'm starting to like Base Camp the more I use it.
-Mark