my external hard drive no longer shows up
I use a LaCie external hardrive for my Time Machine backup on my iMac.. Since October 24th 2012, my Imac no longer recognizes my LaCie..., and in fact no external hard drive is recognized. When I open up Time Machine it asks me to set up another Time Capsule.?? Has somethingchanged either in the operating system [OS X 10.7.5] or with iCloud that would be affecting this? My La Cie turns on and sounds like its working, and I have checked the power supply.