Your 4TB SSD probably has the wrong cluster size for large files

The Dell Laptop Buying Guide UK: Which Dell Laptop Should You Buy? When you purchase through links in our articles, we may earn a small commission. Windows defaults to 4KB clusters, which wastes space on large file partitions. In an age of 4TB SSDs and massive NVMe drives, many users tend to leave the entire storage space as a single, huge system drive. While this is convenient, from an administrative point of view it is a risky move that amounts to flying blind.