Can I have help moving data from an old Windows 98 desktop PC to my new Windows 10 PC?

I've got this really old Gateway desktop PC that started life as a Windows 95 or earlier (I forget) that I'm wanting to get rid of. It's been sitting unused forever and I disconnected it from my home network years ago when I needed more places to plug stuff into my router since I have 2 Windows XP machines & 2 Windows 10 machines on it.

That old Gateway PC has a 3-1/2" floppy drive that I don't have any discs for and never will, along with a CD drive, a DVD drive and I just discovered that it even has 2 USB ports on the back that I never knew existed.

I've tried endlessly to save the 500mb of Photos and Docs on it onto either a CD or DVD but from all I can tell, they both must be broken or at least maybe the formatting of the discs that I do in a drive on my Windows 10 DELL isn't correct.

Heck, during the formatting process, I even thought that since I'm wanting to use the CD in that old beast Gateway thing, I should set the File System setting from UDF 2.01 (Default) to UDF 1.50, thinking I should use the oldest one it had.

Nothing has worked and I've tried reformatting & Copy/Pasting a bunch of times.

Oddly, it will seem like it is writing to a CD and it shows it stepping thru the Videos, Photos and Docs, but I'll always keep hearing the drive's motor start & stop every 5 or 10 seconds & then if I wait long enough, it does finally show all of the files.

But it's totally weird that if I put another blank CD in that same drive, it shows as if all those same files are on it too.

Weird. That must be some flaw in that old Windows 98 Operating System I guess.

I'd at first tried sticking a USB adapter with a flash card in, thinking that would be super quick. But, it wasn't recognized and something told me that it needed a driver, which isn't possible to get on that PC since it isn't connected anymore to the internet.

So, sorry about all this talk but after spending countless hours, I've concluded that it might be best & easiest to just bring that old PC into my home office & park it next to this Windows 10 DELL Inspirion, hook them together somehow directly with a USB cable instead of thru the router, and then maybe I could just access the old PC's drive and Copy my data off of it.

After all, then I can either burn it onto a tiny flash card or just let it stay on my D: hard drive on this where all of my data is. My C: with Windows & my programs is an SSD to make it super fast.

So, I've rambled on but I do need some basic help in knowing that the old hard drive will be able to be accessed by my new PC if I just connect them with a USB cable or will I need to have a keyboard, mouse and monitor on the old PC too?

I've put this in Windows > Windows 10 > Files, Folders & Storage but if an Admin thinks it should somewhere else, please feel free to move it. Thanks for any help. :-)