hard drive question

[msknyc]

Currently I work with macguru enclosures for my data.  A reliable power supply and good cooling.

I now have a laptop and I'm thinking of adding a GLYPH portable hard drive to keep my working files on.  The way I work I prefer to keep editing programs open so I prefer to always have access to the files.

Is relying on a portable hard drive, and leaving it on all the time, a good practice?  (I have a daily backup system so everything gets backed up daily.)

thanx,

~Mark