Quantum is headquartered in San Jose, California[5] and has offices around the world,[6][7] supporting customers globally in addition to working with a network of distributors, VARs, DMRs, OEMs and other suppliers.

[13][14] Plus Development became a successful designer of 3.5-inch drives with Matsushita Kotobuki Electronics (now Panasonic) as the contract manufacturer.

[18] In 2019, the company added a subscription for cloud-based device management and product, called Distributed Cloud Services.

[20][21][19] During the COVID-19 pandemic, Quantum was a recipient of a government loan of US$10 million as part of the Paycheck Protection Program (PPP).

[22] In October 2021, Quantum and IBM announced they would work together to develop LTO-10, the next generation of Linear Tape-Open (LTO) technology.

[23] In April 2023, Quantum announced a new scale-out unstructured data storage platform called Myriad.

[40] The series uses a converged infrastructure that runs file, block, and client services virtually on a single box.

In 2007, Quantum discontinued development of the DLT line in favor of Linear Tape-Open (LTO),[49] which it began selling in 2005 following its acquisition of Certance.

[50] In September 2020, Quantum, IBM, and Hewlett Packard Enterprise released the specifications for LTO-9 storage tape technology.

[52] In 2016, Quantum refreshed its Scalar LTO tape library family and added an appliance for rich media archiving.

The three new systems are part of the Quantum Scalar Storage Platform aimed at handling large-scale unstructured data.

[56] At the end of 2006, shortly after its acquisition of Advanced Digital Information Corporation (ADIC), Quantum announced the first of its DXi-Series products incorporating data deduplication technology which ADIC had acquired from a small Australian company called Rocksoft earlier that year.

[64] The DXi is offered in both virtual and physical appliances, used by remote and branch offices that need a backup target system.

In March 2012, Quantum announced that its vmPRO technology and DXi V1000 virtual appliance had been selected by Xerox as a key component of the company's cloud backup and disaster recovery (DR) services.

[66] In August 2012, Quantum announced Q-Cloud, its own branded cloud-based data protection service, which is also based on vmPRO and DXi technology.

Lattus-X was the first disk-based archive in the Lattus family that includes a native HTTP REST interface, and CIFS and NFS access to applications.

[70] In 2020, Quantum entered into an agreement with Western Digital Technologies, Inc. to acquire its ActiveScale object storage business.

[71] ActiveScale allows companies to manage, protect, and preserve unstructured data, from a few hundred terabytes to tens of petabytes.

[72] It is used in industries such as media and entertainment, surveillance, big data, genomics, HPC, telecom, and medical imaging.

[77] In July 2021, Quantum acquired assets and intellectual property from Pivot3, a hyperconverged infrastructure technology company.

[79] Pivot3's video surveillance appliances, NVRs, management applications, and scale-out hyperconverged software are sold under Quantum's VS-Series product portfolio.

[82] The software platform could be used to record and store video surveillance data and runs on standard servers.