Yes if the partitions on your hard disk are FAT32 or a common linux partition, you can write files to them.
You will have to create a mount point for the partitions, like
And then mount your partitions on that directory
Note that in hdxy, x signifies the hard disk which the partition is on, a for the first, b for second etc. y signifies the partition number. If you installed windows first on the first hard drive, hda1 should be C: drive, hda5 D: drive, hda6 E: drive etc.
Then you can copy files to the /files directory. either in console or through a graphical file manager.
All this must be done as root.