with the professional version 2023.9.35.0 windows version
mapped cloudflare r2 space as a virtual drive Z.
1:create the cloudflare r2 space
2:copy a single file of 175GB with file explorer to the mapped drive
3: error report that no space left on target volume, to delete some files to free space. available space 7.99EB total space 7.99EB
checked with S3browser, there is no such kind of problem.