Still don't understand file upload-folder permissions

Question

I have checked out articles and tutorials.

I don\'t know what to do about the security of my picture upload-folder.

It is pictures for classifieds which should b

Answer 1

0 No Permissions (the user(s) cannot do anything)

1 Execute Only (the user(s) can only execute the file)

2 Write Only (the user(s) can only write to the file)

3 Write and Execute Permissions

4 Read Only

5 Read and Execute Permissions

6 Read and Write Permissions

7 Read, Write and Execute Permissions

First number = OWNER Second number = GROUP Third number = OTHER USERS