Which type of files are .vmg?

Why do computers copy some type of files files faster than others types?

• In same computer while copying files onto external hard drive soem files copy fast and some vary slow why?

• Answer:

  While some of the other answers are giving you some correct information, I don't think they are really hitting on the correct answer(s) to your question. For one thing, larger files will typically copy faster than smaller files. For example if you have ten 100 MB files vs a thousand 1 MB files, both result in 1000 MB of data being copied, however the ten 100 MB files will almost always copy faster. The reason for this is because large files tend to be more sequentially located on the hard drive. What this means is that in order to copy ten files, the computer usually only has to copy from 10 different sections of the hard drive platters. Now, for the thousand smaller files, the hard drive has to look in 1000 different places, and as you can imagine, each time the hard drive has to reposition the read head, this adds extra time. Also, some files are more compressible than others. For example, a 100 MB text file will probably copy faster than a 100 MB zip file. This is because text files have lots of "white space" in them while zip files have almost none. Along the same lines, if you tried to compress a 100 MB text file, you would likely be able to compress it very heavily, probably to close to 80-90%. If you tried to compress a 100 MB zip file however, it would not compress very much at all. It is the same principle in both scenarios. Not related to file size or type, but there is also another reason why a file might copy faster or slower and it has to do with how fast the platter is spinning. The faster the platter spins, the faster you can read data from it. But how can this be different for files on the same platter you ask? It has to do with the geometry of the platters. If you look at a ceiling fan while it is spinning, you will see that the speed at which the blade moves varies depending on which part of the blade you are looking at. For instance, if you look at the blade near the center of the fan and compare that to the very end of the same blade, you will notice that the blade is moving much faster at the end than it is toward the center. It's the same thing with a hard drive platter. The outside of the platter is moving much faster than the center is. So, data stored near the outside of the platter will actually be read faster than data near the inside edge.