If the Glyph drive has any data on it MOVE it to a different location if you do not want it DELETED.

1) Connect the Glyph to the Creation Station
2) Right click on 'My Computer' and select 'Manage'
3) In the Computer Management window click on 'Disk
Management'
4) Maximixe the window so all of the drives are visable.
5) in the lower half of the window locate the Glyph drive and
right click on the white are of the drive and select 'Delete
Partition'
6) The computer will ask you if you are sure say yes.
7) Now locate the Glyph drive again and right click on it again
and select 'Create Partition'
8) Now the partition wizard launches. Select 'Primary Partition'
when prompted as to what knd of partition.
9) You will be asked to choose the size of this partition (in MB
so if a 140GB drive you will need to enter 140000MB)
10) You will now be asked to select the file format. For the mac
to see this drive it will need to be FAT32. The max size that
'Disk Management' will allow is 32GB so if FAT32 is not an
option go back to step 9 and adjust the size. If you select
NTFS just make sure that there is some space left for the
FAT32 partition. It is suggested that the FAT32 is done
first.
11) Now the wizard should be finished and a prompt to format the drive will appear. Select 'Quick'.
12) Now locate the Glyph drive again in the lower half of the
Disk Management window and there will be a inactive
portion of the drive. Right click on this and create a new
partition. The remaining space will be selected by default
and NTFS will be the option. Complete the wizard and
'Quick' format. Done