Question about WD My Book Duo

small note i use this hdd myself on my windows 7 achdung this is not a 20tb hdd but 2x1 10tb hdd in raid 0 wen es dier um daden sicher heit ged dan wiersdusi nur mit raid 1 betreiben ergo nur 10tb efektif 9.09gb pro hdd

don't worry about windows 7 under protection GPT you have to initialise the drive with (GPT). With this partitioning scheme, up to 64 bits of information can be used in logical sectors. This means a theoretical limitation of 9.4 zB (9.4 zettabytes or 9.4 billion terabytes). The problem with GPT is that older operating systems like windows xp only support (MRB) and you can't use HDD on windous versions older than windous 7.