I wanted to replace my "rickety" USB3 Hub. Win7 / 64 is also of the VIA - drivers thrilled (no yellow question mark or so). But the WD MyBook's 3TB not run so absolutely :-( Suddenly one has 1 MB MBR Sector in RAW format (instead of GPT) or read-only if it works out for zich boat trials or no disk online, etc. Covered only that can no good with have the USB3 controller to do and now my 3TB drives with MBR "zerballert" 8- (But back to LogiLink USB3 / 2 Port Card and USB3 Hub everything was back as it should be :-) and GPT with NTFS.