Hello and welcome to the forums, DerrickPike!
Log files which are just plain text files written by the system for recording and troubleshooting (by the user) purposes can be deleted without any issue.. The system will never use them for any critical functionality; theoretically deleting them should not cause system failure
Just to be sure, you can back up those logfiles to another drive and restore them incase something goes wrong...
Alternatively, an easier way of knowing what's in your drives by size and without having to hunt for folders yourself is it to use a program called WinDirStat (windirstat.info/download.html)