How have you placed and named it can depend on whether it can be be recognised. A nuvi 1300 can see anyname.img maps in a Map folder as well as gmapsupp.img in a Garmin folder on a microSD. The latter name and SD placement should be ok with your GPSMap440s [sd:\Garmin\gmapsupp.img]. HomePort can see any file with the correct .img extension and isn't name dependent.
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