If you have a network connection, you could use the windows folder shares...
I'm not sure if you need smbclient or some different software for that, just google for how to use/install cifs filesystem in ubuntu
Open console, and type
sudo mkdir /mnt/windows
sudo mount -t cifs //windowshostname/share /mnt/windows -o user=yourwindowsusername,password=yourwindowspassword,workgroup=youwindowsworkgroup,ip=windowsip
The first line create the directory /mnt/windows
the second line mounts the device "//windowshostname/share" (of course, you must specify those, example: //MyPC/Users ; if you have administrative shares on, you can use //MyPC/C$ to get access to the whole C: drive) as a cifs filesystem to the directory /mnt/windows with the given options (of course, you must also specify those)
Example of this line:
sudo mount -t cifs //MyPC/C$ -o user=sylar,password=1234,workgroup=WORKGROUP,ip=192.168.0.1
now, you have acces to your windows machine in /mnt/windows, but you need root priveleges to write to it.
To get access from windows to your linux (if you really want that
, you must either setup a samba server, or an ftp server (samba would be better for windows access, ftp is less pain). You'll find out about both in the ubuntu wiki.