Quota is the amount of disk space that has been alloted to you by your
administrator. When the disk quota system is configured to deny disk space
to users of the volume who exceed their assigned quota limit, users cannot
write additional data to the volume without first deleting or moving some
existing files from the volume. The response of the system to a user
exceeding the quota limit depends on each individual program. To the
program, it will appear that the volume is full.

You can learn more about disk space quotas in the Help and Support Center.

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