Attachments.expert
Attachments.expert is an application that is used to store your files (attachments) in your own Storage Server without any built-in maximum size limit.
Attachments.expert behaves very similarly to Standard Salesforce attachments and provides flexibility to attach files to most Salesforce Standard or any Custom objects. Different Storage Servers that Attachments.expert currently supports are,
Azure Blob
Amazon S3
Local Disk (HDD or NAS, of your own Windows Server)
FTP
SFTP
This document provides a brief description of the prerequisites, installation, settings, and working of Attachments.expert.