An enterprise needs to migrate 300 TB of historical backup files from an on-premises datacenter to a Google Cloud Storage bucket. The datacenter has a constrained and unreliable outbound internet connection of only 20 Mbps, and the migration must be finished within two weeks. Which Google Cloud data transfer solution should the enterprise choose?

Order a Google Cloud Transfer Appliance, copy the data locally over the internal network, and ship it back to Google Cloud.: ### **What Google Cloud Transfer Appliance is:** **Transfer Appliance** is a high-capacity, ruggedized physical storage server that Google ships directly to a customer's datacenter. Customers mount the appliance on their local high-speed network (via NFS, CIFS/SMB), copy their large data volumes locally onto the encrypted device, and ship it back to a Google upload facility to be ingested directly into **Cloud Storage**. ### **How it meets the requirements:** - **Overcomes limited bandwidth (✓):** Uploading 300 TB over a 20 Mbps connection over the public internet would take over three years. Transfer Appliance bypasses internet bandwidth constraints entirely by physically moving the data. - **Meets the two-week timeline (✓):** Local copying over high-speed datacenter LAN connections (10 GbE / 40 GbE) takes only a few days, followed by standard physical shipping and rapid ingestion at Google's facility. - **High data capacity (✓):** Transfer Appliance models are purpose-built to handle tens to hundreds of terabytes (or even petabytes with multiple units) in a single workflow. ### **Key advantages and capabilities:** - **Multiple file protocols:** Supports standard local network protocols such as **NFS**, **SMB**, and **CIFS** for straightforward mounting and data copying. - **End-to-end security:** Data is encrypted at capture using industry-standard AES-256 encryption keys managed by the customer before the device leaves the datacenter. - **Rugged physical hardware:** Designed specifically for secure, tamper-resistant transport and logistics tracking. - **Turnkey ingestion:** Once received by Google, the encrypted payload is uploaded directly to the target **Cloud Storage** bucket and the appliance is cryptographically wiped. ### **Why this is optimal:** When calculating data migration feasibility, offline physical transport becomes significantly faster and more reliable than online network-based transfer when dealing with large data sizes (typically >20 TB) coupled with constrained or unreliable network bandwidth.