Answer: Create an Amazon Elastic File System (Amazon EFS) file system., E

## Explanation **Correct Answers: B and E** **B. Create an Amazon Elastic File System (Amazon EFS) file system.** - Amazon EFS provides a fully managed, scalable NFS file system that can be accessed by multiple AWS resources simultaneously. - It supports the NFS protocol, which matches the requirement that "Multiple resources in AWS must be able to access the data by using the NFS protocol." - EFS is cost-effective for this scenario because it's a managed service with pay-as-you-go pricing. **E. Install an AWS DataSync agent in the on-premises data center. Use a DataSync task between the on-premises location and AWS.** - AWS DataSync is specifically designed for migrating data to AWS with minimal disruption to existing services. - It provides automated, secure data transfer with built-in validation and scheduling capabilities. - DataSync can transfer data directly to EFS, ensuring the NFS protocol compatibility is maintained. - It's more efficient and reliable than manual copy commands for 200 GB of data. **Why other options are incorrect:** **A. Create an Amazon FSx for Lustre file system.** - FSx for Lustre is optimized for high-performance computing workloads, not general-purpose NFS file sharing. - It's typically more expensive than EFS for this use case. **C. Create an Amazon S3 bucket to receive the data.** - S3 is an object storage service, not a file system with NFS protocol support. - While DataSync can transfer to S3, the requirement specifies NFS protocol access, which S3 doesn't provide natively. **D. Manually use an operating system copy command to push the data into the AWS destination.** - Manual copying is not cost-effective or reliable for 200 GB of data. - It doesn't provide the automated, validated transfer that DataSync offers. - It would likely cause service interruption during the transfer. **Key Requirements Met:** 1. **NFS protocol access**: EFS provides NFS v4.0 and v4.1 protocol support 2. **Multiple resource access**: EFS can be mounted by multiple EC2 instances, containers, and serverless applications 3. **Migration without interruption**: DataSync provides incremental sync capabilities and scheduling 4. **Cost-effectiveness**: EFS + DataSync is the most economical managed solution for this scenario

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