Default backup folder and Shadow volume name:

Default backup folder:
Enter the drive and folder you want to use as the default to backup your data. This can be on any drive available to you including network drives, removable disks, re-writable PD/CD ROM drives etc. The floppy A: drive is not usually suitable though.

Examples:

If your removable Zip drive is e:\ you could use 
E:\Shadow

If your server is drive h: then a good shadow folder would be 
H:\Shadow\MyStuff

Alternatively, if your server folder is \\Server01\c_drive\Users you could use \\Server01\c_drive\Users\Shadow\MyStuff

Hint: It is better to use a drive letter if possible as this allows  Shadow to get and show the amount of free disk space.
If you need to override the default backup folder to co-ordinate specific folders and if you want to shadow to your network but you are not permanently connected to it, use the /d switch in the 'Files to shadow' specification. 
If you use a network drive that you are not permanently connected to as your default backup folder you will find that, when you are disconnected from the network, the program will appear to freeze for a couple of seconds each half minute or so. This is because Shadow asks Windows for the status of the network connection and Windows takes a couple of seconds to reply. When you are connected to the network there is no delay. So, if you are not permanently connected to your network, use a folder on a local removable or hard drive such as c:\Shadow as your default and use the /d switch in the 'Files to shadow' specification to co-ordinate your local files with your server.

Important note: If your server does not support long filenames then you must specify the default folder with a drive letter to enable Shadow to detect that the server requires short file names. 

Shadow Volume Name:
This feature is useful if you use Notebook Shadow to back up to removable disks and the amount of data to backup is greater than the capacity of the disk. 
You can split your backup across differently named disks (volumes).
For example, to shadow your network files to a volume named "Network" and your local files to a volume named "Local":
In the "Files to shadow:" window add "/n=Network" to your network backup specification and add "/n=Local" to your local backup specification similar to the following examples:
\\Server01\data\*.*  /s /n=Network
c:\My Documents\*.*  /s /n=Local
Then...
Insert one of your removable disks into it's drive and type "Network" into the Shadow volume name  field then press the Run Now button. Only those shadow specification lines with /n=Network (and lines with no volume name) will be shadowed.
Insert another removable disk into it's drive and type "Local" into the Shadow volume name  field and press the Run Now button. This time, only those shadow specification lines with /n=Local (and lines with no volume name) will be shadowed.
Change back to the first disk and notice that it's volume name is shown in the Shadow volume name  field. 
You can now use Windows Explorer to delete any local files from the removable disk named "Network" and any network files from the removable disk named "Local" to free up space.
You can even store your /n specification lines privately on the removable disk by using /n+ instead of /n= so you only see them when the named disk is mounted.

If a folder has more than one volume name these will be listed in the drop down.
Each volume has a "Run on start up" property, accessible by right clicking the Shadow Volume Name field then choosing "Properties" from the popup menu. If you switch this property on, Shadow will perform a run when the program is launched and whenever you select the volume or insert the disk. If you switch this property off the "Run on start up" behaviour will depend on the "Run on start up" setting on the main "Options" panel.

A note about PD/CD ROM drives:
If you use a dual purpose drive which allocates two drive letters, one for the read/write PD disks and another for the read only CD disks then you must close Shadow before you use the drive to access a CD ROM. This is because Shadow will poll the PD drive every couple of seconds waiting for a disk to be re-inserted causing the CD ROM to be accessed at a much slower rate than usual.