Answer: Order multiple AWS Snowball devices. Copy the data to the devices. Send the devices to AWS to copy the data to Amazon S3.

## Explanation **Data Calculation:** - 10 PB = 10,000 TB = 10,000,000 GB - Available bandwidth: 500 Mbps × 80% = 400 Mbps - 400 Mbps = 50 MB/s (since 8 bits = 1 byte) - Time required via internet: 10,000,000 GB ÷ 50 MB/s = 200,000,000 seconds ≈ 2,315 days ≈ 6.3 years **Analysis:** - **Option A (AWS DataSync)**: Uses internet transfer, would take ~6.3 years - doesn't meet 6-week requirement - **Option B (rsync)**: Uses internet transfer, would take ~6.3 years - doesn't meet 6-week requirement - **Option C (AWS CLI with multiple processes)**: Still limited by internet bandwidth, would take ~6.3 years - doesn't meet 6-week requirement - **Option D (AWS Snowball)**: Uses physical data transfer devices, bypasses internet bandwidth limitations. Multiple Snowball devices can transfer 10 PB in parallel within 6 weeks **Why Snowball is correct:** 1. **Bandwidth limitation**: 400 Mbps is insufficient for 10 PB in 6 weeks 2. **Snowball capacity**: Each Snowball device can hold 80 TB (Snowball Edge) or 210 TB (Snowmobile for larger migrations) 3. **Parallel transfer**: Multiple devices can be used simultaneously 4. **Time calculation**: With Snowball, transfer time is limited only by local network speed to devices, not internet bandwidth 5. **AWS handles upload**: Once devices are shipped to AWS, AWS handles the data transfer to S3 **Key AWS Service Knowledge:** - **AWS Snowball**: Physical data transport solution for large-scale data migrations - **Use cases**: When network bandwidth is insufficient, data transfer would take too long over internet, or security/compliance requirements - **Alternatives**: AWS Direct Connect could help but still limited by 500 Mbps uplink **Best Practice**: For data migrations >1 PB or when transfer time over internet exceeds planned migration window, use Snowball family services.

Author: LeetQuiz Editorial Team