I have both the Toshibia A205 and the A305.
(1) There is a 2nd drive bay on both - BUT Tosibia did NOT put the HDD connector on the MB. SHAME on them as added cost would have been about $5 if that much. Often thought about having the connector solder on, BUT then Do not know it the "Limited" bios would ever recognize it.
(2) Addind a larger HDD should not be much of a problem.
.. (A) first verify that it is a SATA HDD. If unsure, just look at the current drive, or get model number off of it and google (Most Laptops use the SAT version)
.. If using windows 7. Select Back-up form control panel, then create an image of your system drive. You can put this image file on either a external HDD or on multiple DVDs. when done you will be prompted to create a bootable restore disk. When done.
.. Remove Old HDD, and replace with new larger one.
.. Pop in restore Disk and select restore from image.
.. Bang-pop- gee wess - Done. Reboot and everything is just like it was only on a larger HDD. No reloading windows, no re installing programs, all email and favorites are there.
Added - just googled your HDD - Yes it is SATA
Your choice:
http
/www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007605%20600003459&IsNodeId=1&name=SATA%203.0Gb%2fs
I did not see the x200 listed, but the x205 does show two HDD bays that can be used.
Should just have one or two screws holding the cover. Remove and look to see if there is a connector to plug the Drive in. If so You will probably have to get a "holder" for the HDD (if you do not have, or not included then will probably need to order from toshibia.