Simplify the following text for a Grade 6 native English-speaking person.
Original: Single-user operating systems simply have a single directory or partitions for all users files , there is no individual directory setup per user ( though users can still setup and maintain directories inside this main working directory manually ) .
Simplified: Very often , there is one such home directory per user . Some users , which were created by the system and usually do not log in , do not have such a home directory .