[OSM-newbies] Map on memory card of Garmin GPSmap76CSx

[H.S.Rai]

How to transfer gmapsupp.img on memory card of above device. When
putting micro  SD card in jack (Adapter) to put in laptop, then laptop
can read, but cannot write on card. Earlier I was able to transfer by
puting card in a mobile, and connecting mobile to laptop through USB
port (now that USB cable has been changed, and is working only for
charging purpose, and not for data transfer).

Is there any way to access memory card in write mode directly from
laptop or from GPS device? Why it mount as read only (tried on both MS
windows and Ubuntu Linux)

With regards,

-- 
H.S.Rai