Yes, they should.
Yes, though you might notice it loads/saves a bit slower. Also, the psp is only compatible with sticks up to 16GB, so nothing over that will work.
No, memory sticks only work with Sony products.
No. A Canon SD850 camera takes an SD chip, which is not compatible with any of Sony's memory sticks.
It is possible to purchase 4GB memory stick pro duos from Amazon. There are different brands of memory stick available such as Sony, Lexar and Sandisk.
There are many different places that offer Sandisk 4gb Pro Duo memory sticks. The most reliable online retailer with the cheapest price is undoubtedly Amazon.
Yes it is compatiable with the 8gb.
'Memory Stick' brand cards are a proprietary brand made for Sony products. A Pro Duo Memory Stick is ideal for a PSP, including the 3000 series.
Yes you can. As long as it is compatible a memory stick pro duo.
Yes, those memory sticks have as good as reviews as most other brands. There is nothing wrong with that selected memory stick. Most memory sticks are the same, so brand does not matter too much.
No, the PSP uses 'pro duo' memory sticks, while the DS uses 'SD' memory cards. They are different shapes, and are not interchangable.
yep. but if you have any question or are not sure. just buy a sony memory card.
Of course, it primarily depends on storage capacity. It appears that 4 GB sticks are selling for around $12 and 8 GB sticks for around $15. Memory such as this has wide price fluctuations.