learning to triage your school work is a valuable design exercise in itself.   Whatever length you have now, start but cutting it in half, then edit what’s left down. Not everything you did in undergrad is worth carrying forward if you can demonstrates good design chops. 

If you want real help, posting a link would be your best option.  

With that said. Is the length the problem, or is the content? To be blunt, your portfolio sounds really boring, a portfolio is not a set of construction documents. I’m skeptical that any portfolio with that many plans/sections for one project could be good. Feel free to prove me wrong.     

Don't overestimate the degree to which the reviewer is going to want to study each project in the portfolio.   Representation of your projects should be visually interesting rather than exhaustively complete.

If you are still in school or are a recent grad, maybe see if a few of your design teachers could turn the pages with you and help pick out the best things quickly.  Self-editing can be hard.

If this is an academic portfolio, you should not try to show every project you done in class or even at work. Less is more in some cases. Quality not quantity. The version they want is not your entire library of work. They want you to curate and pick out your best and most compelling and perhaps, visually interesting. Even your portfolios for jobs as well. Maybe a little more than the academic but not much more but more representative of your work experience. Think of it like a marketing brochure/presentation. Don't inundate with every little project. 

Showcase your best projects that showcase your message. If you're about sustainable design or seeking a job in sustainable design, maybe a portfolio that showcases or promotes that. Tailor the "message". The more crud you have to sift through, the more time-consuming it will be. It is a message you are communicating with the portfolio. What are you trying to say? Consider it together with your resume. It's the visual message that supplements your written message (the resume... or in your academic applications, your written message). We all know the general message with being hired or applying to a college program. We know you want the job or want to be admitted to the program. That's not the message you want to give. You want to give them the message of WHY they should hire you or admit you. What you are about. This should be tailored as appropriate to the particular employer and what they are looking for. If you seek work that is in line with your career goal or colleges with programs aligned with your values as a designer, then the written resume and portfolio should communicate why you would be a good fit for them. It's persuasive communication through not only in the words of the resume but also in the visual elements of the portfolio and how it conveys your design thinking process and message. If you want to do residential stuff, it isn't going to compel clients to hire you if all you have is designs for fish processing plants.

Based on the post, it is fair to assume this is a portfolio of all undergrad work. So there is not  going to be distinct SD/DD/CD work. Comparing schoolwork with real world work is strange. A fully baked school project will usually be closest in comparison to a small competition style pre-design concept package, IE fully baked concepts, renderings, and diagrammatic work. With presentation style “technical” drawings that look developed but upon closer scrutiny are not.

What you show in a pro4pro portfolio is dependent on what kind of job you are trying to get. If you have 10 years of experience and you’re trying to get a job as a PA, you’re probably going to want to show some nice technical work in your portfolio along with a bunch of nice images. My last portfolio had a bunch of CD level detail work in it because at that level people do want to see that without having to drop into a set. You just have to do it tastefully.  

Arbitrary long tail conventions of 5 to 10mb design portfolio's to be submitted should stay in the realm of dial up modems IMO.    

Focus on what the job requires and trim content to fit: how does concept carry through in final design? renderings - show the more complex ones? technical drawing - need not show extensive set, just the more com  plex indicative of your skill set.

In reviewing portfolios most people want to look at a few sheets that "tell a story" and look at skill sets and knowledge evident in the more complex content [at least that's what I do]

Yes you can. You got this.