So, if you have a Windows 10 PC, then trying to format a 64GB SD card will mean you can only select exFAT as a formatting option.
This won't work in the Navigator V as it needs to be FAT32.
You have two options :
1) use a 32GB card instead which can be formatted to FAT32 in Windows
or
2) use one of the Windows special utilities such as PowerShell.
To use PowerShell, type PowerShell where it says Type here to search at the bottom Left Hand Side of your screen.
Next, use Windows explorer to find the drive letter of your SD card slot. For mine, it is D which is pretty normal. You will see the drive letter next to the name of the SD card in Windows Explorer.
Now type the following, being very exact. Nothing can go wrong, but nothing will happen if a minor spelling mistake is made.
For my SD card, the drive is (D
so I typed :
format /FS:FAT32 D:
Note the space between format and /
also the need for a : after D
If your drive letter is different, e.g. E, then type format /FS:FAT32 E:
It takes a very long time, about a minute for each 1%, so you will only see 0% completed for a minute or two, but come back in 5 minutes and this should have changed to 5%. Expect the whole process to take nearly 2 hours.