I have an ZV5000, and they seem to have the same RAM specifications. The maximum is 2GB of RAM for both laptops.
http://www.edgetechcorp.com/memory/upgrade.asp?cid=28619
(i wouldn't buy from this site if I were you, just look on ebay)
how much dose memory can online storagem hold
Not much on anything, but that depends on what you are using.
2gb
8 MB
The PDA can typically hold between 16 MB to 64 MB of memory.
They can hold up to 80 GB.
16gb
Off/On, that's it.
For an iPod, an 8 GB memory stick will hold approximately 2,000 songs.
depends on much memory is on the memory stick and the size of the pictures.
a lot
it depends on the size you get