Some manufacturers deploy physical authentication tokens in the form of a flash drive. These are used to control access to a sensitive system by containing encryption keys or, more commonly, communicating with security software on the target machine. The system is designed so the target machine will not operate except when the flash drive device is plugged into it. Some of these "PC lock" devices also function as normal flash drives when plugged into other machines. Upon the announcement of the InnoTab 2, I was really impressed with what Vtech had done to improve on the original InnoTab. It's clear that they've listened to feedback, taken note of what was happening with other kids tablets and then responded with something as good, if not better, than the rest. Either we are using laptops, digital cameras, mobile phones, music consoles or any other electronic gadgets; we are now able to store files of our choice. In cameras, a lot of images and video footages can be stored and in mobile phones, files can be stored either in the form of images, videos, music tracks and much more. I think that both of these devices would be suitable for any gadget-loving 2 year old. The things that you might like to consider when making the choice, are what features do you think she'll be interested in. For example, would she like to be able to watch her own favorite DVD on the device? Which are her favorite cartoon charaters? You can check out some of the games and apps that are available for the InnoTab 2 and the LeapPad 2 on their websites (I've provided the addresses below in my replies to Nikki and Sylvia - Oct. 1/2). The various writable and rewritable forms of CD and DVD are portable storage media supported by the vast majority of computers as of 2008. CD-R, DVD-R, and DVD+R can be written to only once, RW varieties up to about 1,000 erase/write cycles, while modern NAND-based flash drives often last for 500,000 or more erase/write cycles. DVD-RAM discs are the most suitable optical discs for data storage involving much rewriting. There are undoubtedly limitations of these devices, and many parents are deciding that an iPad or Android device is the better way to go. However, both the InnoTab and LeapPad have tapped into a market that is definitely out there. Under this circumstance, the immediate format, like quick format, is able to help repair many card problems and make it workable again. But, as to the information stored on this card, memory card recovery software is able to help a lot before the original card data is replaced by anything new there. I'm not sure of the reason why Vtech have chosen to release two new InnoTab versions. There's also very little information around at the moment about the InnoTab 2s, other than that it'll cost a bit more (around $20 more I think). Also, it's not clear how beneficial the Wi-Fi connection will actually be, in comparison to connecting up the InnoTab via a home pc. Time will tell I guess. However, a few models of xD card readers based on the Alauda chip do allow direct access (bypassing the above mechanisms) to an xD card's flash memory. These readers have been reverse-engineered and Linux drivers have been produced by the Alauda Project, which has documented the on-chip data structures of the xD card. According to this information, xD card headers are similar to those used by SmartMedia, and include chip manufacturer information. Most Type II devices are Microdrives (see below), other miniature hard drives, and adapters, such as a popular adapter that takes Secure Digital cards. A few flash-based Type II devices were manufactured, but Type I cards are now available in capacities that exceed Microdrives. Manufacturers of CompactFlash cards such as Sandisk, Toshiba, Alcotek and Hynix offer devices with Type I slots only. Some of the latest DSLR cameras, like the Nikon D800, have also dropped Type II support. "Fragmentation may slow down the effective write speed but the effect is tiny compared with that of fragmentation on hard drives. Defragmentation tools may be used. However, it is unnecessary to use any disk optimization tool because on an SD card the time required to access any block is the same." Most USB-based flash technology integrates a printed circuit board with a metal tip, which is simply soldered on. As a result, the stress point is where the two pieces join. The quality control of some manufacturers does not ensure a proper solder temperature, further weakening the stress point. Since many flash drives stick out from computers, they are likely to be bumped repeatedly and may break at the stress point. Most of the time, a break at the stress point tears the joint from the printed circuit board and results in permanent damage. However, some manufacturers produce discreet flash drives that do not stick out, and others use a solid metal uni-body that has no easily discernible stress point. SD cards serve as a good alternative to USB drives since they can be inserted flush. SD cards have a small lock switch (at least the large ones). You can also see this on the photos included in the article. What is this switch good for? Could someone include this information in the article? Thanks! --18.104.22.168 (talk) 11:35, 31 July 2009 (UTC) As the feature size of flash memory cells reaches the minimum limit, further flash density increases will be driven by greater levels of MLC, possibly 3-D stacking of transistors, and improvements to the manufacturing process. The decrease in endurance and increase in uncorrectable bit error rates that accompany feature size shrinking can be compensated by improved error correction mechanisms. Even with these advances, it may be impossible to economically scale flash to smaller and smaller dimensions. Many promising new technologies (such as FeRAM, MRAM, PMC, PCM, ReRAM, and others) are under investigation and development as possible more scalable replacements for flash.