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Maps files used in Memory-Map for All are not designed to be accessible to the user. We have found that too many people accidentally move or delete the maps, and they may also be attacked by malicious apps, causing Memory-Map to malfunction. The recommended way to install maps is to download them from the Digital Map Store (See Using Online Maps).
However, Memory-Map for All does allow you to backup your maps, so they may be re-installed later, or installed on another device (subject to the terms of the license). To make a backup copy of the current set of maps, tap the Maps button .png) then the Menu button  , Map Storage > Backup Maps To... You can then browse to the storage location where you want to save a copy of the maps.
To restore maps from a backup device, tap the Maps button then the Menu button , Map Storage > Copy Maps From... Select your device backup folder, and the maps are copied from the device into the secure internal storage managed by the app.
There are times when you may want to manually install maps. For example custom maps that you have made yourself or imported from third parties using the Memory-Map Navigator PC app. Any maps that you use with the old Memory-Map desktop mapping products can be used with Memory-Map for All. This includes Memory-Map map CDs, or any third party maps that are compatible with the desktop product. You must buy a Navigator license to use 3rd party maps or certain older Memory-Map classic maps. The software will prompt you to buy if this is needed when you open the map.
The first step is to place your maps on a device or in a folder where Memory-Map for All can access them. Once you have the files on the device, tap the Maps button  then the Menu button , Map Storage and Copy Maps From...
The operating system provides the user interface allowing you to browse the folder containing the maps. Select a folder and they will be copied into the private storage area within the map. The user interface to browse the device depends on the device manufacturer and other file management apps on the device. You may be able to use a local network, or cloud storage. These facilities are provided by file management apps and Memory-Map is not responsible for what you see in the file browser app.
If you have used an old version of Memory-Map on your PC, maps may be found on your PC hard drive.
Copying Maps from PC to Phone
•Finding the Map files on your PC. In Memory-Map Navigator for Windows, find the map in the Map List and click Edit. The second line in the Edit Map Data dialog shows the full file system path. They are typically in the folder C:\Maps or C:\Maps_V5, or in AppData.
•On the Mac, open Finder, click the Go menu at the top, then hold down the Option button on the keyboard to reveal the "Library" in the Go menu list. Click Library/Application Support/Memory-Map/Default/DMS and you will find the map files under there. Or, just use the Backup Maps To... command in MMfA.
•Maps must have the *.qct file extension, sometimes with a *.qc3 file or a QC3 folder. MMfA is not able to directly read tiff, BSB or other file formats. You have to use Memory-Map Navigator on Windows to convert the third party map into qct.
•Copying files to Android. Generally, you can connect an Android device to your PC and copy files using Windows explorer just as if it were a disk drive. You may have to select the USB connection type from a system pop-up on the phone. We recommend making a folder under "Download", such as Download/Maps. Note that older versions of Memory-Map on Android allowed you to access maps directly from folders outside the app. Unfortunately, Memory-Map files have been a target for malicious activity in the past, and they are also vulnerable to accidental deletion by the user or "clean-up" utility apps. We now make a secure copy of the maps, which should prove to be much more reliable.
•Copying files from Mac to iPhone. To copy large files from Mac to iPhone, the best way is to use Airdrop. You can google it or take your mac and iPhone to an apple store and have someone show you how to use it. Place the maps in a temporary folder within "On My iPhone'. If you use iCloud, you are going to be uploading the data to the internet and then downloading it, which is not the most efficient way to transfer a large file.
•Copying from Windows PC to iPhone. There are numerous third party apps that may help. I would say it is best to use a trusted cloud service, such as iCloud. You are going to be uploading the data to the internet and then downloading it, but I don't know a better way.
•Once you have the maps on the phone, run MMfA and tap the Maps button, then Menu > Map Storage > Copy Maps From... Browse to the folder where you save the maps and open. Note you are selecting the a Folder that contains your map library, which may be multiple levels of folders. You cannot select an individual qct file.
•When the maps have been copied into the secure storage within the app, you can delete your temporary copy of the maps.
USB Thumb drives are useful for keeping a backup of you maps and for copying data from one device to another. However, there are a number of "gotchas" that you need to be aware of.
•Some drives are formatted with the FAT32 file system. This is fine unless you want to copy large files over 4GB. Maps downloaded from the Digital Map Store are always stored in files 4GB or less, but some of your legacy maps may be much larger. In this case, use a drive with the exFAT file system.
•Before you unplug a thumb drive, you must tell the device to "Eject" or "Unmount" the drive, before you unplug it. Failing to do this will result in corrupted data.
•iOS does not provide a way to eject or unmount a drive and seems to regularly corrupt exFAT drives. We have had better luck with FAT32 drives. Even powering off the iphone seems to leave the drive in a corrupt state.
Next: How to delete a map
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