Save the one complete file as a PDF and upload it to the system. For large files, the file size can be reduced by lowering the resolution of images. Use Word to save the images in a lower resolution (see https://support.office.com/en-us/article/reduce-the-file-size-of-a-picture-in-microsoft-office-8db7211c-d958-457c-babd-194109eb9535) then make a PDF from this file. Or you can use an online PDF compressor, such as https://www.ilovepdf.com/compress_pdf. Remove spaces and any special characters such as “&” and “<” in filenames of documents uploaded. These characters may result in an invalid URL.