Realm Upload

I’m looking to upload my world to a realm so I can play it on my PC. The world is 400.5mb, I have used texture packs before but I have removed them for the transer. The upload reaches the end of the 400.5mb progress bar and I recieve the error message “There was an error”. I check my realm to see if the upload went through anyway but sadly it does not. Im using fibre internet and have tried through wifi and through ethernet but both have the same issue. I have also tried uploading a smaller world and that worked fine, it was about 30mb and worked the first time i tried. I’m using the PS5 version of minecraft on the latest update available as of 1st of November 2025