I leave my PC on 24/7 (protected by a good UPS) but my external HDDs ...I power them on and off as needed. They are certainly more susceptible to damage if they're dropped or fall over while running. From the info I see posted in this forum...the enclosures do not seem to be very durable.
I often read that people turn their external hard drives on and off for only when they need them.
Are external hard drives (in general) constructed only to work like this, or is it okay to leave them on all the time (as well as they are well-ventilated and have an internal fan)?
Sometimes I leave my external hard drive (Maxtor and/or WD) on for a few days at a time so I can upload a torrent of a DVD of the kiddos to the grandparents. Am I putting myself at risk?