Today, Toshiba introduces a new 8TB capacity to its existing "X300" internal desktop SATA HDD line. Separately, Western Digital unveiled My Book Duo storage system designed to give both consumers and professionals a capacity of 20TB.

Toshiba's X300 series is designed for both gamers and professional users alike. The 8TB mechanical drive spins at 7,200 rpm and features a 128MB cache. The company is including a two-year warranty for the product.

The new 8TB model features Toshiba's cache technology, a self-contained cache algorithm with on-board buffer management, which optimizes cache allocation during read/write to provide high-level performance in real time.

Ths drive is immediately available from retailers such as Newegg. It is being sold for $269.99.

Western Digital also today unveiled My Book Duo storage system designed to give both consumers and professionals.

The My Book Duo storage system comes with RAID-optimized WD Red hard drives inside to speeds of up to 360 MB/s sequential reads, and RAID-optimized firmware which is perfect for two-disk array systems with auto management of drive operations to help ensure read/write cycle data integrity.

The My Book Duo storage system also features a USB Type-C port with all cables included so it's universally compatible (supports USB 3.1 Gen 1/3.0/2.0) right out of the box and offers high speed connectivity. The storage system also has two additional USB Type-A hub ports to allow for additional accessories, including drones, action cameras, card readers, keyboards, mice, USB drives, or phone syncing and charging.

Available in 20TB, 16TB, 12TB, 8TB, 6TB and 4TB capacities, the storage system also comes with password protection and 256-bit AES hardware encryption with WD Security software built in to help keep private content secure.

The My Book Duo storage system is available now from wd.com and at select retailers and distributors around the world. In the United States, the My Book Duo storage system has a Manufacturer's Suggested Retail Price (MSRP) of $799.99 (20TB), $599.99 (16TB), $419.99 (12TB), $329.99 (8TB), $289.99 (6TB) and $259.99 (4TB).