How to make Languages,Uploads,Downloads Writable ?

[WebSuccess4You]

How do I make Languages,Uploads,Downloads Writable ?
I thought changing the permissions to 644 would make them writable but that does not seem to work.
I found an explanation of Unix permissions: http://www.zzee.com/solutions/unix-permissions.shtml
I changed all those permissions to 777 then to 766 because the Owner should have all permissions
but others should have read and write :    6    rw-    110    Read and write access are allowed
7    rwx    111    Everything is allowed

    Is this correct?

[strata]

I have a look at my host Cpanel set permission like this :
Owner :
7 (Read, Write, Execute)

User :
4 (Read)

World:
4 (Read)

and if upload file I have set permission to 744

[WebSuccess4You]

Thank you very much.

[strata]

Glad to know if this useful