16 CD, unlimited download and speed, support external links (charge, but it is very cheap). The download address is valid for a long time (it is not clear how long). The initial space is 2G, which can be expanded for free through integral. The single gear speed seems to be 50M (disgusting, it is said that the next new version will be adjusted to 1.2G). I used this network disk at that time, because it was very confidential and suitable for office use. I think the function is ok, and I recommend it to the landlord.