Before you start, I'd like you to back up the internal memory of your 630 (everything on your 'F drive') to a separate folder on your PC for safekeeping. Follow the instructions for "
How to back up the contents (for app 9.x and earlier)". Having done that, we can get you out of almost any ditch you can imagine apart from broken hardware! Please use the procedure outlined here >>>
https://www.tomtomforums.com/thread...-to-the-computer-and-how-to-restore-it.17864/
To do that, you'll need your device connected and running. That will (usually) cause TomTom Home to wake up as well, as you have discovered. Just minimize Home since we won't be using it now.
Once you have completed your backup...
OK. Your 'E' drive is your SD card, and the 'F' drive is the internal memory of your 630.
What's missing from your SD card is evidently only the formatting overhead.
Now - what most of us here do is to keep our map(s), custom POI (and for some of us, our tunes) on the memory card and keep everything else on the device's internal memory.
To do this, and now that you're working with the files and folders successfully...
From the internal memory area (F), slide over these two folders to the SD card (E):
"maps"
"USA_Canada"
Once you have moved these folders from F to E, bring Home back up on your screen again and PROPERLY DISCONNECT your device using the little arrow icon down in the far lower right corner. Turn your unit off, disconnect it, and turn it on again. Make sure that your unit behaves normally. Now you're ready to go!