


Previously, the SMB compression decision algorithm would attempt to compress the first 524,288,000 bytes (500MiB) of a file during transfer and track that at least 104,857,600 bytes (100MiB) compressed within that 500-MB range. Compressed files will consume less network bandwidth and take less time to transfer, at the cost of slightly increased CPU usage during transfers.īased on testing and analysis, we have changed the default behavior of compression. This removes the need to first deflate a file manually with an application, copy it, then inflate on the destination PC. SMB compression allows an administrator, user, or application to request compression of files as they transfer over the network. We first introduced SMB compression in Windows Server 2022 & Windows 11. If you are still able to get the Windows 11 builds (since Microsoft has started kicking those with unsupported devices back to Windows 10), today's build is the one to get! Here are the release notes of Windows 11 Build 22449.
