Home NAS Setup for Data Backup

I need help setting up a NAS (Network Attached Storage) at home. The primary purpose of the NAS will be for data backup and file sharing.

Essential tasks include:
- Setting up the NAS unit
- Configuring it for data backup and file sharing
- Ensuring accessibility from computers and smartphones/tablets

Ideal skills and experience:
- Experience with NAS setup
- Knowledge in data backup and file sharing protocols
- Familiarity with configuring access for multiple device types