sync.sh: script currently matches all drives in Media, not just USB drives

[aboutaaron]

Fix it

[esagara]

So right now changing https://github.com/cirlabs/vm/blob/master/sync.sh#L20 to

device_path=`echo $mtabline | grep 5EF8-BCBA`

seems to match only the usb drives. But I don't know if that is device specific. Thoughts?

[esagara]

So the 5EF8-BCBA seems to be specific to the manufacturer of the usb sticks we use. Additional sticks have a number appended on the end of them, ie 5EF8-BCBA1, 5EF8-BCBA2, 5EF8-BCBA3, etc...