When an email or an upload form states a size, set that cap in FileSway: 10, 15, 25, 35 or 50 MB, or a custom size in KB or MB. These are FileSway’s caps. A destination can use a different rule, and FileSway does not promise the file will be accepted.
If one file still can’t fit, FileSway can split the PDF into numbered parts and keep page order. A cap on the whole submission still counts the parts together, so read the instructions you were given. Preview the original against the finished pages, and check forms, links and signatures. Your original stays unchanged.