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Everything that goes into a USB

USB flash drives, portable storage devices, have taken their own capabilities of a computer

When the first USB memory hit the market, the experts he predicted a great future. It was a data storage device small, compact, handy and simple, not scratched or dusty and could be used over key ring or pendant. In the last two years, however, this small device, with its increasing ability to store books, documents, audio, video and software has become the personal computer world's lightest. Or, as some call it, the Swiss Army knife of the digital world. It is common for all family members share the same computer, the same applies to the offices where you could say that there are more turns to employees. In order not to create conflicts of keys and allow some privacy, most operating systems offer the possibility of creating different sessions for different users. Thus, for example, when a mother feels modern and executive to answer your mail, enter your username and password and a computer is different from that used by their children.

The user folder is the reminder that the screen of the photo session is a holiday in La Gomera, the last modified document is the recipe for Peking Duck and the password for the IM program is the date of written backwards first kiss. In it, the user saves the list of URLs in Firefox or Explorer favorites and browsing history. In short, this folder is all that distinguishes the user's computer from any other. What few people know is that all this information takes up very little space. Given that most programs use (mail client, browser, text editor) are already installed on every computer in the world, enough to have that little user folder stored on a USB stick to turn any computer a personal computer. USB memory, or 'Thumbdrive' is a storage system comparable to a hard drive smaller than usual. Normally used for documents, music or photos from one computer to another, but may also contain programs and even whole operating systems. Depending on your building (which now reaches to eight gigabytes) can be used to integrate the user folder on other computers with a compatible operating system or install a completely different system from any computer. Also, with the right software, you can use USB memory and MP3 player, such as photo album or personal phone to make free calls anywhere in the world.

Migo Personal, always at home. Use Migo Personal storage device is like opening the door of any house and be in itself. Saves all folders, documents and user preferences, the system installed on any compatible computer (with the same operating system) and takes advantage of the programs it contains the host computer to optimize its functions. The user experience is identical to the one with your own machine. Migo Personal software is compatible with Windows 2000 and Windows XP and has a memory of up to four gigabytes. Just take that little user folder stored on a USB stick to turn any computer into a personal computer. At the beginning of the session, the system prompts the user for a password. Once identified, it will find all the documents, the wallpaper, the list of favorites ... Everything will be where you left off. You can send and receive emails as you would on your own computer and you can continue working on projects that left half. All this without loading new programs or type passwords.

"People have been very expensive portable devices above, but only take advantage of a four or five per cent capacity," said Jay Elliot, Migo designer for PowerHouse Technologies Group Inc. "It is very heavy dependent on coffee and internet cafes to use the computer, but buying a laptop to check email, chat with a friend or reading the newspaper when we go on vacation is to exaggerate, "he says. Elliot concludes that a USB is affordable and replaceable on the contrary, a laptop is expensive, heavy, delicate and susceptible to viruses and disclosure compromised: from email passwords to the numbering of the Visa. With a USB memory protection is much higher: when the user closes-end-line and removes the session-remove-the device will be as if he had never been there.

Memories USB 'smart' sticks

U3 is a software company that sells programs specific to portable hard drives, from USB sticks to iPod. His intention is to take to the street line of USB devices 'smart' to cover all needs. In addition to the basic software, mail and antivirus, other models include The Gimp image editor, software and Skype instant messaging (IM and VoIP). U3 TravelDrive, Memorex house, including free mail client Mozilla Thunderbird and McAfee antivirus for safety. According to the spokesman of U3, the company is in contact with major companies in the sector of portable storage hardware. By the time Kingston Technology, Memorex and Verbatim have announced their "smart memories" and the address book of U3 includes America Online (instant messaging), ArcSoft (photo editing), Cerulean Studios (instant messaging), McAfee, Nullsoft ( audio playback) and Skype.

External Hard Drives

To bring these movies or digital photos that occupy hundreds of 'mega' from one side to another, nothing better than an external hard drive. Hard disks are like closets that, no matter how large they are, always end up filling. Much more in these days when users store hundreds of photos, movies and music, they just quickly with Gigabytes. Today, thanks to fast connections such as USB 2.0 or Firewire ports, you can use external hard drives with hundreds of gigabytes of capacity However, the real problem comes when you have to carry so many files to and fro. Familiar USB memory key chains have done away with the floppy for the majority of cases, but their capacity is limited, the greatest reach only a couple of Gigabytes. Here come into play external hard drives. The idea is not new, but now, thanks to fast connections like USB 2.0 or Firewire ports, you can use external hard drives with hundreds of Gigabytes of capacity and transfer speeds approaching that of hard disks internal.

In modern operating systems like Windows XP, it is not necessary to install any software. Just connect the disk to the USB port and will provide a new drive on your computer. It only remains to decide the size, which determines the price and limited disk capacity. The general rule is that the smaller the higher the cost per Gigabyte. Less than 2.5 inches. They are very small, while sometimes hard to believe that in there has a hard disk. With one-inch disks can achieve a capacity of five or six gigabytes, and it sells for around 100 euros. The disc is only slightly larger than the plug, about like a box of matches. In the case of 1.8-inch drives is slightly larger size, which allows models are already available with 40 or 60 gigabytes, but can be small and paid around 180 euros. 2.5-inch drives.

The disk size is the same used in laptops, although in this case is presented within a housing to transport and connect directly to the USB port of any computer. The advantage of these models is that their consumption is small, and this allows the hard disk take power directly from the USB connection. You do not need an external transformer. With this size is common to have capacities from 40 Gigabytes to 120 Gigabytes. Prices are in line with capacity between 80 euros and 180 euros. 3.5-inch drives. These discs are used in desktop computers, and again they are prepared with adequate housing and the USB connection. The capacity is not a problem, since models can be found up to 600 Gigabytes. However, these drives consume more electricity and need to be powered by an external transformer. This means you have to transport a package to be used more and need to have an outlet nearby. With player, please. Aware that external hard drives are often loaded with photos, music and movies, manufacturers offer an interesting option: to integrate within the disc player and a direct outlet for the TV or stereo. In this way can see photos and movies, or listen to music without having a computer nearby.

When you connect the disk to the television screen presents a menu from which you can examine the contents of different folders on the disc. Usually these units come with a remote control to do all this from the armchair, and some have a memory card reader to get through the photographs directly. The player with external drives are usually 3.5 inches, although there are some models of 2.5 inches. Capacities range from 40 gigabytes and 320 gigabytes, and prices between 120 euros and 300 euros depending on size, brand and design.

Millions of data within a few centimeters

Memory Cards "Flash" are very common in portable technology: the camera, GPS or mobile browser, they are the storehouse of everything that you want to keep. That that "the best jam is on the smaller boat" also applies in the new technologies for mobility. What is truly important from a digital camera (photographs) of a GPS (the program with all the details of streets and routes) of a mobile phone (the calendar with the contacts and numbers) or a PDA agenda (files, emails, addresses ...) fit into the few square inches that has a memory card "flash", whose thickness is just over two millimeters.

Unlike regular hard drives (devices that store data in computers), cards flash has no moving parts but are composed of a single piece of semiconductor material. This can be very small and not lose the stored data when they suffer bumps and drops. Its shape is usually square or rectangular and are inserted into a slot (port) that incorporate the devices. The well-known as "flash drive" or "USB keys" are nothing more than cards flash (such as machines featuring pictures) with a USB plug attached allowing this type of memory to the computer for the ubiquitous universal serial "(USB). When compared to conventional hard drives, memory cards flash is expensive, since the relationship between price and storage capacity is much higher. The advantage is that cards are also very small and weigh even less, making them ideal for small devices that take up continuously. Moreover, since there are composed of moving parts can rattle as much as you want without affecting its performance (the needle of a hard disk of a balanced pace jogging session could end up damaging the equipment).

Do not lose stored data when subjected to knocks and drops.

The cards are divided into microscopic cells that accumulate electrons at different voltages when electricity passes through them, thereby shaping a map of differences in electrical charge. This map is the way in which the card stores data received from the portable device, whether photographs, documents, videos, etc.. A Memory Cards "Flash" are called "non volatile" because they retain data when disconnected from the electrical flow. The first cards "nonvolatile" was invented in 1971 and became known as EPROM (Erasable Programmable Read-Only Memory "). That is, read-only memories, programmable and erasable. The EPROM not lose data if power flow is suspended, but to re-record should be erased by ultraviolet rays. In short, it was impossible to record with the current allowed ductility. Rewritable up to 100,000 times.

The Intel company, the same who invented the EPROM, got a memory card constructed in which the cells acted differentially from each other, allowing them to perform multiple operations simultaneously storage. Such cards are called EEPROM, and could also be erased and re-record without having to pass through the ultraviolet rays. The current memory card "flash" is a derivation of the EEPROM and therefore retain their main characteristics: speed of execution and ability to be re-recorded. Still, the cards can be re-record a limited number of times, which would be around 100,000 operations of storage, enough for a conventional use.

Cards flash memory can store from 8 megabytes up to 128 Gigabytes of data (text documents, music, movies, ...), depending on the brands and types. Within this range, it is normal to use cards that can hold between 256 megabytes and 2 gigabytes. The price will vary depending on storage capacity, but also depend on other factors: the speed of data transfer (measured in megabytes per second or a number followed by an "x"). The transfer speed is important in some equipment (eg cameras high resolution, the rest is sufficient with a speed of about 40x, equivalent to 4 Megabytes per second ") because they allow the unit to save or delete the data quickly and work more effectively. In the market you can buy cards with high storage capacity and good rate to prices. For 72 euros you can get a card from a Gigabyte of capacity and 11 megabytes per second write (73x). Thereafter the price will shoot: there are cards of 2 Gigabytes of capacity and 12 megabytes per second (80x) write speed costing over 150 euros.

Types of mempory card

It is not uncommon for a single person has an agenda PDA, digital camera, a third generation mobile (3G or UMTS), a GPS and an MP3 player, so it is important to assess the compatibility of cards used by each device to exchange them as needed. The types of cards on the market are numerous, but these are the most commonly used:
* Compact Flash (CF). It measures 43x36 mm and weighs between 15 and 20 grams depending on the type (there are two: I and II. The second is thinner but also works in the slots of type I). The used numerous brands, including Nikon, Samsung and Minolta. They range from 8 to 12 Megabytes Gigabytesaunque the most common are 512 Mb or 1 Gb (twice).
* Smart Media Card (SMC). It is much smaller than its predecessor and weighs just two grams. The use Fuji, Samsung and Olympus. Is falling behind, partly because it does not exceed 256 megabytes of capacity.
* Secure Digital (SD). Is often used to provide data on which you wish to limit the copy (such as software or music). It weighs a couple grams, measures 32x24 mm and is used by Kodak, Casio, Hewlett Packard, Nikon, Canon, Minolta, Panasonic and Toshiba, among others. Its storage capacity can reach 128 gigabytes. It currently has 40% market share.
* Multimedia Card (MMC). Born in 1997 in the hands of Siemens and Sandisk, is similar to Secure Digital. Many devices with SD port can use it, but not the same thing happens in reverse. It measures 24x32 millimeters and store up to 2Gb.
* Memory Stick. Created by Sony, is used in almost all devices, from cell phones to portable gaming consoles, but it just has curdled in the competition. There is a newer version dubbed Memory Stick Pro, Sony has said could reach 32 Gigabytes of capacity with a transfer rate of 20 megabytes per second.
* Microdrives. In fact only cards flash drives are tiny devices designed to fit the card slot Compact Flash Type II. When they were born with a capacity of 340 megabytes, but reach 6 Gigabytes and, according to experts, will soon be on sale from 10 Gigabytes.