An internal hard drive will generally be faster than an external one.
There are external and internal hds
external serial ATA is six times faster
External serial ATA (eSATA) hard drives is up to six times faster than USB or FireWire.
External SATA (eSATA) is up to six times faster than USB or Fire Wire
without a hard drive your PC wouldn't work at all. so you must have a hard drive, whether its internal or external...
Most external hard drives can be used as internal ones. Provided that the IDE, SATA, or SCSI interface of the external hard drive is the same as the desktop's system board hard drive interface. Users can remove the USB casing and proceed to plug the data and power cables into it. The external drive, just has an additional component, that's used to hook up with the USB port.
No, you have to also delete what you want from the external hard drive. Remember, an external hard drive is just like a internal one. So, for example, if you delete picture a on the internal hard drive, that's all that is deleted. If picture a is also on the external hard drive (why would it be though), then you need to also delete it there.
50-85 Mbps for eSATA vs 25 - 45 Mbps firewire 400 not sure what 800 goes to but eSATA will still be faster it's just like an internal drive. eSATA is up to 6 times faster than external firewire according to the fabulous Guide to managing and maintaining your PC by Jean Andrews
They make internal and external 500 gb HDD
You can safely name external and internal hard drives whatever you want on a Mac.
Generally speaking yes, but consider that hard drives can be either internal or external. It's like asking "Is the apple the same as the fruit?"
No, they don't disappear, unless you use the command move to...