Memory Cards > 2 GB - 4 GB Memory Cards > Memory Stick > $30 - $40

Advantages: Relaible
Disadvantages: expensive

The Sony M2 is the another kind of memory card, The m2 in fact isn't much different from the micro SD in my eyes. Both of them are small. For the latest Sony Ericssson phones, they all use the m2 for external memory. The m2 is a little bit thicker than the micro SD. For ease of use, this is of course easy to use, insert it into the card into the reader that you can use. For reliabilty, so far I didn't face any errors or problems with it. but still ...
...it doesn't worth the money. You may try thr San Disk one, they should also have the same quality card but a lower price. Overall, I don't find much things special with this card, and generally, the micro SD is till more compatiable, so I do not recommend you to buy it if not necessary. ... Read review

Advantages: Bigger space and better functionality
Disadvantages: Nothing to say of.

Introducing the new Sony Memory Stick Pro Duo Mark2 8GB for Sony's wide range of cameras.This big space but compact Memory Stick is another addition to Sony's wide range of Memory Sticks.Basically the Memory Stick is used to store photos or videos if you do not want a bigger space in your camera.This 8GB Memory Stick is helpful if you need a bigger space than the normal 1-4GB Memory Sticks that is included in the camera pack.The advantages of this ... Read review

Advantages: work on any device that hv a SD slot
Disadvantages: none

Lately, price for sandisk are rolling down quick everywhere, but it is still more cheaper if you buy them online instead of in store. The Sandisk SD memory card works on almost any devices that has a SD slot, such as camera,computer, and some game consoles. Most camera accept sandisk SD, but some sony brand camera require the special sony brand SD,which cost a lot more, so read carefully when you are buying a sony camera. It comes in many different ...
...the one and two GB. But if you are buying the 4GB, it would only cost a few dollars more than the two GB. Other bigger capacity include 8 and 16 GB are way more expensive, so you might as well just buy two 4 Gb, you save a lot that way. ... Read review

Advantages: fast transfer rate
Disadvantages: none

...GB flash memory card by Kingston costs about fifty bucks online from J and R.This plug in and play device offers a 4MB per second transfer rate, which is relatively fast for similar products. This particular Kingston SD-HC cards offer larger-volume Data Storage and optimized Recording performance with support for FAT 32 File formats. In addition, Kingston's SDHC cards use a class 4 rating that delivers a minimum data transfer rate of 4MB per second ... Read review

Advantages: fast, big capability,reliable and stable
Disadvantages: none

I purchased the Kingston 4GB memory card about three weeks ago to use in my Canon digital camera. I had a Kingston 1GB card before getting this card which is not enough for my use. I am very happy with this card. In my opinion, the Kingston brand is reliable and the product is stable. This card meets all my needs. It works very well and I've had no problems with it so far. The memory card is fast and the 4GB is more than enough space for all my photos. ... Read review