Why are the displayed capacities of mounted systems set at 128 TB, 256 TB, 512 TB, or 1 PB?

After a share is mounted, its capacity corresponds to the storage capacity of the associated Object Storage Service (OSS) bucket. The capacity of a bucket is not limited. A file system requires a defined storage capacity, which is expressed as a numeric value. As a result, the bucket capacity displayed on a file system is fixed at a numeric value. However, the displayed capacity does not affect the actual storage capacity of the bucket.