Beginner Geek: Hard Disk Partitions Explained - How-To Geek
https://www.howtogeek.com/184659/beginner-geek-hard-disk-partitions-explained/
WebMar 16, 2014 · Primary, Extended, and Logical Partitions. How to Partition. How Partitions Appear as Disks, But Don't Offer the Same Performance Benefits. Hard disks, USB drives, SD cards -- anything with storage space must be partitioned. An unpartitioned drive can't be used until it contains at least one partition, but a drive can contain multiple partitions.
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