Turns out Garmin installation process takes up about 13GB of space for each map.
Garmin Express deposits downloads in
The files used by Basecamp to use the maps on your computer are stored in
The latest map for North America is 2017.20 and the Product1 folder is only 2.43GB. I kept the other files in the folder just in case so it is 3.32GB with those in place.
There's a folder for each version of map you choose to keep.
The download folder for 2017.20 was using about 9GB. You do not need the contents in the download folder once you've installed the map on the unit unless you're going to redeploy the map onto a different PC.
I deleted 2016.20 entirely and kept only the installed map for 2017.10. The cleanup freed up 25 GB of space on my HDD.
To get to those folders, hit Windows+R, enter %programdata%\Garmin\
Make sure you have show hidden folders enabled in "folder options" (push alt key... select "tools"... "folder options")
Make sure you're satisfied with the change. The final step frees up the disk space, but you won't be able to roll back once it is done.
Control panel > system > system protection
"configure", "turn off system protection"
This frees up the space. Now, turn it back no so that you have the ability to roll back using system restore for future changes.
I know some one will comment that is nothing because 3TB drives are cheap today, however 25GB is a considerable waste space on a SSD system and wasted time and space on every set of backup you make.
Long ago I learned to at least leave the last previous map on the computer. So i.e right now I have 2017.1 and 2017.2 stored on the HDD.
In the past I would remove the previous version and I had a problem where MapSource could not see the newest map.
But maybe my way to delete is different from yours, I use REVO uninstaller and it might have been a bit too aggressive deleting some files.
I've posted about this very same issue because more OS "disk" space isn't always an option on new hybrid tablets/laptops.
Deleting everything in the normally hidden Program Data\Garmin\CoreService\Downloads\Maps directory won't affect Map source after you've installed to your devices & Mapsource. As Falcon9 pointed out, Mapsource files are in Program Data\Garmin\Maps, unless you've installed them to another drive or directory (in which case there will be a shortcut to the map folder in Program Data\Garmin\Maps).
To make matters worse, during an install the map build data is stored in Program Data\Garmin\CoreService\Downloads\Temp but they get deleted after install (except for the empty folders!!). This is why you need almost double the free OS drive disk space of a map to do an install.
Everything in Program Data\Garmin\CoreService\Downloads is only taking up valuable space after installations. Garmin Express should give you the option to clean them out, imo. I just went through the whole twisted process yet again with 2017.20.
Is there a link to where these unneeded files reside on a Mac? For those of us who have a laptop with a SSD, disk space is precious and if we can purge several gig that doesn't impact BaseCamp it would be very helpful. I do use Garmin MapManager to delete the previous map versions once I'm comfortable that BaseCamp is fine with the current?
To make matters worse, during an install the map build data is stored in Program Data\Garmin\CoreService\Downloads\Temp but they get deleted after install (except for the empty folders!!)
Do they? I use Garmin Express and found every bit of temporary files from past downloads retained.
I am not sure how the update software on Mac handles the temporary files after you're done downloading. Look in the BaseCamp, then locate where the map is and start approaching that folder. Don't delete that folder. Crawl up a few levels and see if you can find a folder beneath Garmin called downloads or similar.
You could also try searching for recently crated files over 500MB to hunt it down. Make sure you have invisible folders and such visible. If the system didn't purge temporary files, the download folder contains the two sets of files one of them for the unit, and one set for the computer. the download folder would be holding up about 9GB if the system didn't purge it, you would see gmapprom.img on the PC.
There should be another set in the folder designated by the BaseCamp and this one shoudld only be 3GB. This one's all you need to keep.
Although this is probably not for everyone. I have "lifetime map updates" for both Garmin Zumo 550's that I have but I usually only update once or twice a year. After downloading and installing new maps to both my units, I use JaVaWa GMTK to backup the maps to an external HD. I then uninstall Garmin Express. Problem solved.
There's no reason to keep anything on your computer if you're not using the map on your computer with BaseCamp to complement your unit.
In the past year, Garmin only released two updates. Used to be quarterly. When it comes to the last mile and POIs, NAVTEQ maps have always been about two years behind.
.. too much of a generalisation. I recently reported a map error, that involved the map not allowing routing one way down a two way road. It was corrected in the next update.
We also had a new housing estate completed recently near us, that involved a completely new junction off a major route. It appeared on the very next update.
Great info, thanks!
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