Sony site say that the maximum card size for the P910i is 2Gb. I would think this is right as mobile phone processors are nothing like as fast as PC's/laptops so when you put bigger and bigger sticks in the the whole thing slows down as the processor starts to struggle to keep tabs on the larger address base. I think the processor in this phone is prolly an ARM running at no more than 500 Mhz - Step back in time to when your PC was this fast and you have some idea of the problem larger memory sticks bring. I think at that time the typical RAM was about 32K to 250K.

Well you are wrong or we would still all be using 286 processors. You obviously need to do computing 101. Ok the processor can only do one thing at a time. So on start up it checks the available ram viability bit by bit, now, more ram = more time. How slowly do you want me to say that?

Try this at home... set up a timer and run it with 256 ram. Instal max ram and run the timer again.

People who have nothing  to add to an exchange but  feel they have to insult the previous contributer need to learn the basic concept of engaging their brain before hitting the keyboard.

Do you even have a Sony P800 P900 P910? Have you experimented with differnt sticks in them?

Tell me will they all work with ProDuo sticks for example? Have you tried the same with a PDA and seen how it struggles with a 4GB stick even tho it can adress it?

You seem like you have a rough idea without actually having any experience of what you pass comment on.

Thoughout life it is better if you have no or limited knowlege on a subject to keep silent. Boys often find that this is impossible when a female says something of which they thought they knew everything - such a guy usually ends up making himself look rather silly. Now I have spent enough time on a nonentity. I have to go party byeeeee.

Oh dear oh dear. Where does one start? You must learn how to have a discussion. This isn't a competition. I had some good, backed up opinions. Lets have another go:

"Do you even have a Sony P800 P900 P910?" Duh: "The limit is allegedly 2GB. That's what I have in my P910i." My P910i, yes I do own one as you might be able to read from that post.

I think your main problem here is that you're assuming that the P910i uses its memory stick like RAM in a computer. It's storage space. It does not affect the running of the PDA. Have you ever noticed that it will run WITHOUT A MEMORY STICK? So you can not compare it to different RAM sizes in a desktop PC. IT IS NOT RAM.

And why would we be all using 286 computers? I mentioned nothing to do with the advancement of software and hardware engineers. And typical RAM on a 500MHz PC? Well that would have probably run Windows 98, so about 128MB RAM. Again where do your figures come from? 32K? You're about a decade early.

Do you own a P910i? Where did you get the 500MHz from? It clearly states its a 156MHz. Its not even comparable to a desktop processor, as the OS is hard coded onto the ROM chip.

I just don't get your point: "when you put bigger and bigger sticks in the the whole thing slows down". When did bigger storage SLOW down a computer?

There's no MAGIC in FAT file systems. Something is or is not possible due to the standard written. Quote from Wikipedia:
"The limit on partition size was dictated by the 8-bit signed count of sectors-per-cluster, which had a maximum power-of-two value of 64. With the standard hard disk sector size of 512 bytes, this gives a maximum of 32 KB clusters, thereby fixing the "definitive" limit for the FAT16 partition size at 2 gigabytes"

Are you seriously trying to imply that the P910i uses some proprietary  file system, and then adapts that for the PC? Err, no way. I can format a memory stick on a PC and the PDA will read it. That's just so unlikely in the face of the scientific facts I have above. Can we try and put some facts in this discussion?

And you're late? Who's problem is that? If you're so disinterested in what others have to say, and can not open your mind to new knowledge, why are you bothering at all? I took absolutely no notice of your gender. This is so ridiculous.