You might think about downsizing the pdf. Save as other > Reduced size pdf in Acrobat.
Care to define “too large?”
The PDF 50MB and still need to add more content..
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Export your Indesign file to Adobe PDF (Interactive) and In the Interactive dialog box select General> Pages>check the radio button of Pages and now select the "Compress", In the Image Compression set your JPEG Quality: "Max, High, Medium, Low, Minimum"
It will help you to reduce the pdf file size.
Is your intent to print this folio? You may not want to downsize, and you certainly won't want to export as interactive if that's the case.
The PDF export gives you the possibility to downsize the pictures to a given DPI. In addition you can change the quality parameter. This will however influence the overall quality of your document.
Packaging means you wanted to package your InDesign for sending ofere to the printing service provider?
PDFs with a lot of images and at print quality can be huge and that is nothing to be worried about. The price for quality is file size...
Bad advice without explaining the consequences. Thanks.