If you need a solution right now , here are practical steps, from simplest to most complex.
: Browsers may struggle to handle large data "blobs" in memory, often hitting a limit around 2 GB . total size of requested files is too large for ziponthefly
The exact limit varies depending on the version of ZipOnTheFly and the server configuration, but it's typically around 2 GB (gigabytes) for most online zip tools, including ZipOnTheFly. If your files exceed this limit, you'll get the error message, and ZipOnTheFly won't be able to compress your files. If you need a solution right now ,
Find the for your specific server software Recommend alternative transfer tools for your OS here are practical steps
Reduce attachment size to send large files with Outlook - Microsoft Support