[Discuss] question about hdd partition

[J.Bakshi]

Dear list,

hope everyone is well and doing good. I have some questions about HDD 
partition under linux. please read below

1) How can I make a linux based partition which automatically compress and 
then store the files ?

2) How can I make a linux partition which automatically encrypt the stored 
files and ask password when some one try to retrieve it ?

3) is it possible to make a hidden partition under linux ?

Thanks for your time. Good day.