Zumo 595LM: How Can I Check Device and/or SD Card Memory Used?

I'm fairly new to the Zumo 595LM and thought I saw how much memory was used somewhere in the menu. I can't find it anywhere. I'd like to add, I'm about to install a 32gb SD card as well. If anyone can point me in the right direction, I would sincerely appreciate it. Thanks, Ray

 

Thanks for the help....... I found a way in Garmin Express in which it shows my Zumo at 86% full with no SD card. I find that ridiculous since I don't have any planned trips on the device and I cleared all saved places as well. The following are what I have checked;
Under MyMaps on the Zumo I have four listed maps with three being checked.
CN North America NT 2018.30 FourSquare
North America DEM
CN North America NT 2018.30
The fourth map is a snowmobile trail map that is not checked.

I don't understand what the differences are between the three North America maps. I'd like to add, I just done all the updates through Garmin Express. I should only have the original North America Map that came with the 595LM with an added snowmobile trail map. I believe the device usage is high due to the possibility of duplicates due to having three types of North America Maps. Any thought and/or suggestions would be most appreciated? Thanks, Ray

 

I may have to post this issue to see if I can get rid of what's not needed....... Thanks for the help. Ray

 

Interesting....... I just inserted a new 32GB SanDisk Extreme Plus card. I checked the memory through Garmin Express and it still shows Zumo at 86% full. I thought it would show differently with the SD card, am I missing something? Thanks, Ray

 

Thanks for trying to get me there..... I did try this earlier but, I can't find the window you posted. The following is what comes up;

 

Thanks.... I do understand that any maps on the Zumo is loaded and taking space. I have my snowmobile trail map unchecked for two reasons;
1) If checked it mixes in with my North America Map
2) Not using right now
Now I need to figure out why I have to check on three different types of North America Maps when it should only "show" as one. Thanks again for your help. Ray

 

I came from Windows 7 and earlier........ I.M.O. Garmin has made it a major P.I.A. for Mac users. Basecamp is like stepping into the stone age compared to MapSource. MapSource was extremely easy to use and I used it for every major trip for years. With Basecamp you have to open this, click on that to get what you want compared to one motion in MapSource. This is one of the major things I miss about Windows & Garmin. Thanks for showing me how to do it on a PC. Ray