As your computer gets older and older, it fills up its memory and gets clogged up. This makes it take longer to access data. This is called fragmentation. De-fragmenting your hard drive will delete un-necessary files and errors (dont worry it wont delete your personal stuff) and makes finding certain data faster. For example opening a folder, opening a program and starting up. This speeds up your computer significantly if it is very fragmented. I recommend you do it as it will really help but it is your decision. :)
No.
no defragmenting your hard drive will only increase available space.
speeding up applications by clumping file components together
You can maintain the hard drive by defragmenting it with built in windows programs. I don't know haw to do it on a mac. Theres not much alse you can do but not putting unessary data will keep it faster.
run the defragmentation program because it is the simplest fix to try and often helps
Defragmenting
Defraggler is a defragmenting tool. One that I highly recommend. It goes further than the one provided in Windows itself. Defragmenting your hard drive puts all of the pieces of file on one place, speeding up your computer. If you have a solid state drive, don't defragment it, it won't help any.
yes
Some of the benefits of the Lacie External Hard Drive are that one can take the External Hard Drive to wherever one need it, also that these External Hard Drives are practical and easy to take since they are small.
While the default file system used on a Macintosh doesn't require defragmenting, you can do so with a thrid party utility called iDefrag. However, some argue that defragmenting a Mac actually hurts performance due to the nature of the file system's indexing.
without a hard drive your PC wouldn't work at all. so you must have a hard drive, whether its internal or external...
Portability is one of the biggest benefits. Easy installation is another.