Manual for Samsung printers are available on HP's server (because it's actually HP that makes Samsung printers). However that server is
incredibly slow, with each manual taking many minutes to download. My link above does work but only if you're prepared to wait a long time for the download to take place.
Now that you've told us exactly which printer you've got, I've downloaded the manual for it to my own computer. (It took about 6 minutes. I told you it was slow!). Then, to hopefully make things a bit easier for you, I've re-uploaded it to here:
https://easyupload.io/9vjk93
(Ignore the bit about registering and signing in; you don't need to do it. Simply click the 'ordinary' Download button, i.e. the left hand one to commence the download).
I can't see any specific reference to borderless printing in that manual but you might care to check the 'Page Border' setting, to ensure that you've not got any type of border selected by default. (See pp. 311-312).
Also, as Atheist suggests, check that it's not the software that you're using that's putting the border there, rather than the printer settings. (It might help if you told us which program you're using).