Dear Users
I want to built NAS storage using Dell power edge server for PERSONAL use and YouTube files. What i want to ASK that let say if I access 1GB file from my server from another connection outside my LAN. so when 1GB file is downloaded what is the internet usage on my server? means if some other person downloads a file but what about my internet usage??Biggest thing is going to be what you upload bandwidth is. As far as setting a priority of who gets a better connection its all shared connections with no one having a greater priority, however whoever has the better download bandwidth will gain a stronger handshake to the upload from the server serving it. Best assumption for bandwidth to users accessing the server for files is to divide the number of users by the total bandwidth and so if you have 10 systems downloading from it they all get 10% of total bandwidth assuming they all have the same RATE of download speed.

Unless you have fiber with a lot of upload bandwidth, you might find troubles with downloads from elsewhere if there are many people hitting your server.

Also to note the server that is hosting files, as there are multiple downloads happening you could get heavy drive sweeping as the server is trying to send out packets of multiple different files at the same time. If you have a project or files that are frequently to be downloaded you could host them into a RAM Drive, and this way the Hard Drives aren't cause of latency in the download as the data is almost immediate to FORMED to packets and outbound from system RAM. https://en.wikipedia.org/wiki/RAM_driveBundle of thanks bro
So, to reduce my side data if I only give read only access then will it reduce data usage?Read Only would only MAKE it so that no one would be able to alter the files at your end. If the file is 100MB and they request it, then its going to be 100MB uploaded from your server to be downloaded to them.

Read Only benefit is only if you dont want anyone altering the files on the server, however they can download them to their local computer and change the read-only attribute and alter a copy of the file at their end. If you dont give write permission on your server then your file that is read only and the shared folder that they access cant have files added only copies of those files downloaded.