Support: Inserting a microSD™ Card on a Garmin® Automotive Device - YouTube
Garmin Topo U.S. 24K Northeast microSD Card | REI Co-op
Garmin microSD Card Door (for EchoMAP)
Amazon.com: Professional Ultra SanDisk 32GB verified for Garmin Nuvi 3597LMTHD GPS MicroSDHC card with CUSTOM Hi-Speed, Lossless Format! Includes Standard SD Adapter. (UHS-1 A1 Class 10 Certified 98MB/s) : Electronics
Garmin 16 GB microSD™ Card Class 10 Card with SD Adapter