File larger than 5 MB do not uploading to GCS

Hello! I use Bitrix CMS to upload files with service account keys. Files larger than 5 MB do not uploading while bulk transfer, why? PHP settings max_file_upload is 1024M. When I just edit some element, all files are uploading no matter what size.

Hello,

Based on the documentation, even if you use a single-request upload to upload a file to GCS, you can use single-request uploads for files as large as 30 MB as well.

Which the following ways: Single-request upload, Resumable upload and XML API multipart upload you used to upload your file to GCS? Is there any error message while you upload file?

Hey, HaoZha! I use XML API multipart upload, no errors comes. large files just stay on the server.