I want to start my own file storage/backup service like Dropbox, Skydrive, Box etc. I have 60000 customers. I want to give each customer 1GB free space (lifetime). That means I need 60TB of storage. I will increase space for more users time to time. I want my file backup service to be cloud based, redundancy. Can you please tell me how many servers & how powerful servers it's needed? Also, what equipment, accessories it's needed to make a powerful service? From where I can buy them with best price? Please tell me. Also, if you have other information regarding file backup/storage service, it will be helpful for me please. Also feel free to ask me :)
You can build your own service on top of Amazon's cloud infrastructure. See this: http://aws.amazon.com/backup-storage/