CopyObject enables copying objects between buckets within the same region, as well as copying objects within a single bucket. Copy operations do not support cross-region copying and require read permission on the source object.

The TOS Go SDK provides three object copy methods:

Standard Copy: The size of the copied object must not exceed 5 GiB.

Multipart Copy: Except for the last part, all other parts must be at least 5 MiB in size. The part numbers for uploaded parts must be within the range [1, 10000].

Resumable Copy: Applicable for scenarios where large objects are copied within a single bucket or between two buckets in the same region using the SDK.

Last updated: 2026.08.10 10:24:55

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