Hi,
What is the storage capacity that you need , you mention 4GB
What is total storage capacity needed ?
When buy NAS product even in your home you need think of what benefits you
gaining.
What do you need ?
Do you need snapshots/checkpoints per hour per day etc..?
Do you need battery backup to save all the open files before any power
lost...etc..?
Then you have several vendors that can sell you NAS storage.
NetApp
EMC
Microsoft storage server
Etc..