Memfault works best when the symbol files that are uploaded are small enough to be downloaded quickly within our web service. For this reason, we limit the file sizes on uploaded symbol files.
When uploading large symbols files, the error Uploaded file is too big. Max file size is 250000000 bytes might appear if the symbol file is greater than 250MB.
In these cases, we suggest following some of the best practices within Memfault's Interrupt article, Dealing with Large Symbol Files.
If applying all of these strategies still does not get the symbol files below 250MB, please reach out to us.