Can i use an external hdd without an internal one on my laptop?
Answers:
Possible yes but I do not believe an average laptop would support this. The hard drive would run very slow because of the USB or firewire connection so you would need an SATA port on the back on the laptop which only new ones have. Even then its a long shot.
yes
Short answer, not with windows. Currently it is impossible to install most windows operating system to a external directly, I suppose you could pull out a internal and put it in an external enclosure and boot off it if your motherboard supports USB boot... but there might be something wrong with that, I don't remember.
It is possible in Linux, hell you can run linux off a usb flash drive (half gig if you wanted to).
But the downside is that it is slower than an internal drive do to limitations of USB's speed capablities.
Oh, and with windows firewire is out- there are no firewire boot motherboards, period.
ESATA (external serial ATA ... Extenal Serial Advanced Technology Attachment if you want the full name) might work, but then you would need a rather new computer and a higher end external hard drive that has an ESATA port.
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