About ZOHO excel sheet

Dear Sir,

first of all i would like to congratualate on the zoho sheet.It is very nice tool for SMB and individual users.
It would be more helpful if you introduce features such as
1) folder view ( where main user can save files in different folders for different users. Here in the current version it will be difficult to find out the excel sheet as when the no of files increase. folder view will be more helpful option)

2)setting up auto filters ( as we do in the excel sheet setting up auto filters to differentiate any result in any column)

3) unable to have log of which user is updated when.(need log for modification sheet)

4) locking of particular row/column

Please try to put these features in the tool.Pls let me know if these features are already in too).

With regards,
Prakash.K
Essential Engineering Solutions Pvt.Ltd
9845076813