How-to guides for S3.

Amazon S3 has no rename API — keys are immutable. Here's the standard copy + delete pattern, with metadata and tags preserved.

Multipart upload — part sizes, parallelism, retries, and the 5 GB single-PUT cap that pushes you to multipart.

Never ship AWS keys to the browser. Server-signed presigned URLs let the browser PUT directly without the credential.

Browser, AWS CLI, or presigned URL — three ways, with auto-inferred filenames and zero key exposure.

How to actually search S3 with Tab autocomplete, and when S3 Inventory + Athena is the right pattern.

Versioning, delete markers, MFA Delete — and how to actually purge instead of soft-deleting.

DeleteObjects API explained — up to 1,000 keys per request, and how versioning changes the answer.

Presigned URL or workspace invite — when each is the right call, and why presigned links can't be revoked.

Skip per-person IAM users for human collaboration. Email invite, per-bucket role, one-click revoke.

One credential per provider, one sidebar, Cmd-K to jump, and right-click to copy across clouds.

Server-side cross-cloud copy without downloading locally — one click in S3 Viewer, AWS CLI, or rclone for bulk.

Cmd-K fuzzy switcher across every connected provider, plus AWS CLI named profiles for scripts.

The IAM s3:prefix Condition that everyone misses, plus when workspace roles are simpler than IAM.