GPSMAP 60CSx, 60Cx, 76CSx, 76Cx
eTrex Vista HCx, Vista Cx, Legend HCx, Legend Cx, Venture Cx
Rino 520HCx, 530HCx
There are limitations to the size of microSD card used and to the number of detailed mapping segments that can be recognized by a device.
If at the most recent device software version, these limitations are:
It is recommended the maximum size for the microSD card should be 4 gigabytes (GB)
Each expandable memory device will be able to recognize up to 2,025 detailed mapping segments
If 2,025 detailed mapping segments are loaded to a microSD card, but the file does not reach 4GB worth of data, the device will not show any more detailed mapping than what is provided by the mapping segments.