USB flash drives hold large amounts of information due to the advances in silicon technology. The storage inside the flash drive is very small and dense. This allows the manufacturer to build a small flash drive that can store gigabytes of data.
The capacity of flash drives is increasing all the time. 4, 8, 16 and 32 Gb are common and very cheap. 128 Gb drives are available.
Not all flash drives are the same. Some will hold as low as 512MB while a few will hold as much as 128000MB (128GB). The most common amount of capacity (now days) for a flash drive is 1000MB (1GB).
A CD is useful if you are going to play music in an older stereo or car. Most will have a CD player. Some newer CD players will play CD's with MP3 compressed audio, extending the play time by as much as 90%. A flash drive is useful if you want to hold more music (most flash drives hold much more than 1 Gigabyte (1024MB) of info, CD's top out at 800MB. Flash drives can also hold any type of compressed audio or higher-than-CD quality audio (higher than 16 bit, 44.1kHz). Flash drives also have no moving parts, and are not as susceptible to extreme temperatures, scratching or moisture.
Every flash drive can hold 10 kilobytes. In fact they can hold much more than 10 kilobyte. It is likely that during original development and testing there may have been some with a 10 kilobyte capacity but those first available commercially were in the multiple megabyte range.
A flash drive can hold anywhere from 256 MB to 8 GB.
like 10 bucks depending on the size
From personal experience, Amazon.com's flash drives are much more inexpensive than those sold by retailers. However, if you are shooting for the lowest price, you should confirm that your local retailers are not offering any coupons or discounts on flash drives first before purchasing one from Amazon.
the answer's in the question - cheaper means cheapsee related link
In practical terms it probably doesn't matter much, but internal drives are generally faster than flash drives and if it's a large file that could make a difference.
About 4 gb
It depends on how many gigs the flash drive can hold. If you are windows, here is a good way to figure out how much if it isn't on the actual flash drive: first open up windows explorer, and on the left hand side it should say favorites, library's, and computer. Click on computer, and then right click click on the flash drive that you want to know the memory for. it should show you a pie chart of how much the device has on it, and has left.
MFM is modified frequency modulation and it works on floppy discs to encode the data. It is now becoming an obsolete system since DVDs and flash drives hold so much more data.