What is the recommended character count per line for files containing random data?

I'm building a system to store data from QRNGs to be used at a later point. obviously, you don't want a 500MB file with one single line - unless you do. I'm kinda new to this specific use-case. I don't know, would it be ok to store it all in one line if I'd be using the random data as needed ... maybe streaming it? Each use will depend on what probabilities need to be assessed. So, one use might need 7 bits, then next might need a few thousand. But no matter what the need is, whatever I use will have to be discarded and removed from the file. (not sure if that has bearing here). Sorry - rambling. Is there a recommended character count per line? Is it ok to store it all in one line? Are there industry standards concerning this? I don't even know where to look. Google just brought up a bunch of arbitrary links that really don't have anything to do with my use case.