open source storage

• FreeNAS is an operating system that can be installed on virtually any hardware platform to share computer data storage over a computer network. 'Free' as in 'free and open source' and 'NAS' as in "network-attached storage", FreeNAS is the simplest way to create a centralized and easily-accessible home for your data. 

FreeNAS, the world’s most popular open source storage OS, utilizes the ZFS file system to safeguard and protect all of your important data. ZFS is a enterprise-level open source filesystem and volume manager that offers unprecedented flexibility and commitment to data integrity. It’s a next-generation file system that eliminates most, if not all, of the limitations found in legacy file systems and hardware RAID

http://www.freenas.org

• Openfiler

Openfiler converts an industry standard x86_64 architecture system into a full-fledged NAS/SAN appliance or IP storage gateway and provides storage administrators with a powerful tool to cope with burgeoning storage needs.
https://www.openfiler.com/

• From cloud-based backup solutions to high-availability, content delivery networks (CDNs), object storage has become an integral part of the modern technology landscape.   

https://www.digitalocean.com/community/tutorials/how-to-set-up-an-object-storage-server-using-minio-on-ubuntu-16-04

• Minio is an object storage server released under Apache License v2.0. It is compatible with Amazon S3 cloud storage service. It is best suited for storing unstructured data such as photos, videos, log files, backups and container / VM images. Size of an object can range from a few KBs to a maximum of 5TB.

https://github.com/minio/minio/blob/master/README.md