🚀 go-pugleaf

Recently, I  bought a Macintosh  plus and non-Apple external hard disk
drive.  They work fine except one problem.  The problem is as follows:

Even though I insert the system diskette into the  3 1/2-inch internal
floppy  disk   drive, of course,   it has at  least  both 'finder' and
'system' files in it, Mac, first of all, searches the 'system' file in
the hard disk drive, and 'boot' from the hard disk drive.   The floppy
icon appears on the Finder desktop when  the Mac is  'booted' from the
hard disk drive.  This means, the floppy diskette  is not ejected when
booting from the hard disk drive.  If  I remove the system folder from
the hard disk drive, Mac  tries to search  the  hard disk drive first.
However, since Mac cannot find the 'system' file in  the drive, it, in
turn, searches  the file in the floppy   diskette,  and finally 'boot'
from the diskette.

This problem seems to be not so  serious for me,  since I usually boot
Mac from the hard disk drive, but this problem seems to be strange.

Are there anyone who can teach me how to 'boot' my lovely Mac from the
floppy diskette first?

Thank you in advance.