Setting up SFTP on Ubuntu Server, remoting in via VirtualBox Ubuntu Desktop. Need to fix folder permissions for access

admin

I have a physical box running Ubuntu Server and a VirutalBox virtual machine running Ubuntu Desktop. All I’m trying to do is set up access to my /media folder on the physical Ubuntu Server which contains my external hard drives so I can copy files from my Windows machine through the Ubuntu Desktop VM to my Ubuntu Server box.

This is the guide I followed: www.websentra.com/setup-sftp-server-on-ubuntu/ (I did not do the part 5. Authenticating via public keys)

I did create an admin login for the purposes of FTP instead of leaving it anonymous.
I decided to play around and test changing the ChrootDirectory to /media/, you can see my 4tbstorage and 8tbstorage drives:

# override default of no subsystems
Subsystem       sftp    /usr/lib/openssh/sftp-server
Match group ftpaccess
ChrootDirectory /media/
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp

and

tom@ubuntu-server:/etc/ssh$ lsblk
NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda                         8:0    0 476.9G  0 disk
├─sda1                      8:1    0     1G  0 part /boot/efi
├─sda2                      8:2    0     2G  0 part /boot
└─sda3                      8:3    0 473.9G  0 part
  └─ubuntu--vg-ubuntu--lv 252:0    0   100G  0 lvm  /
sdb                         8:16   0   3.6T  0 disk
├─sdb1                      8:17   0   9.8G  0 part
└─sdb2                      8:18   0   3.6T  0 part /media/4tbstorage
sdc                         8:32   0   7.3T  0 disk
├─sdc1                      8:33   0   9.8G  0 part
└─sdc2                      8:34   0   7.3T  0 part /media/8tbstorage

Folder permissions:

tom@ubuntu-server:/etc/ssh$ ls -l /media
total 8
drwxr-xr-x 6 tom tom 4096 Oct 14 23:41 4tbstorage
drwxr-xr-x 6 tom tom 4096 Oct 13 22:05 8tbstorage

I know this is permissions related but I don’t know how to fix it without potentially making a mess of them so I am reaching out for help. I’m also not sure what I should put for ChrootDirectory. One thought that crossed my mind was adding my admin user I made to the owner group for /media, but that is a guess.

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