i have files with 1000+ pages and size @ 30 mb , while opeing in LO 7.6 the LO hangs or no response while other activities are normal windows 10 & windows 11 64 bit pro, saving format .xlsx.
If you expect any decent help, re-open your question to mention OS name, LO version and and save format (file extension). To do that, press … under the question, then the “pencil” icon. Don’t use a comment; it is much nicer to have all information in a single location without the need to scroll for it.