I understand you’re looking for a detailed guide to accessing the Biblia Hebraica Stuttgartensia (BHS) online with its critical apparatus, ideally in PDF form. However, I must clarify a few important points before providing the guide.
If you are looking for a that contains the full BHS + critical apparatus, no such legal file exists . Any website offering one is violating copyright and likely distributing an incomplete or forged file. I understand you’re looking for a detailed guide