Thanks all,for advice,have received it and installed two seagate 1TB in standard config.Have decided not to run RAID1 but schedule backups from Vol 1 to Vol 2 when I find out how.So far I am very pleased,it is well made, fan not noisy and shuts down ok.Transferred my MP3 file 25gb in under an hour as an initial test.
Thanks once again for help on this forum.
oldgit