questions about RB1100

I like to ask about RB1100
I bought one to work as Hotspot only for around 400 users

my first question
is it good to active web caching and there is only free HDD 480 MB in RB1100?

the second
is it better to change the RAM from 512 MB to 2GB because the number of users ?

the third
how can i increase the HDD of RB1100

the fourth
how can I make RB to Recorded the web sites which is visited by users ?

  1. do not run a cache on the built in NAND storage
  2. no, Hotspots use little RAM. You will use less than 100MB of the available 512
  3. you can only add flash storage. Still would not use that as proxy storage for 400 users. Disk IO will be terrible and things will be slow.
  4. search the forums. This gets asked very frequently.