How can I mount a sdcard and view it in /dev of a virtualbox guest
Solution 1:
From the Windows host determine the physical drive
wmic diskdrive list > drives.txt
notepad drives.txt
Once you know your drive, you can attach it as a raw disk. Example below uses PhysicalDrive2. The following command must be done with elevated privileges:
VBoxManage internalcommands createrawvmdk -filename MySSDDisk.vmdk -rawdisk \\.\PhysicalDrive2
Attach the disk to the Virtual box and you should see the /dev/sdx when you start up Ubuntu