Transferutility Download S3 C# |verified| -

Built-in events allow you to monitor transfer progress, providing total bytes transferred and remaining data. Prerequisites

public async Task DownloadLargeFileAsync(string bucketName, string key, string filePath) { using var s3Client = new AmazonS3Client(); var transferUtility = new TransferUtility(s3Client); var downloadRequest = new TransferUtilityDownloadRequest { BucketName = bucketName, Key = key, FilePath = filePath, // Uses S3 part numbers for parallel fetching MultipartDownloadType = MultipartDownloadType.PART }; // Subscribe to progress events downloadRequest.WriteObjectProgressEvent += (sender, args) => { Console.WriteLine($"Progress: {args.PercentDone}%"); }; await transferUtility.DownloadAsync(downloadRequest); } Use code with caution. Downloading Entire Directories transferutility download s3 c#

public async Task DownloadS3DirectoryAsync(string bucketName, string s3Directory, string localDirectory) { using var s3Client = new AmazonS3Client(); var transferUtility = new TransferUtility(s3Client); var request = new TransferUtilityDownloadDirectoryRequest { BucketName = bucketName, S3Directory = s3Directory, LocalDirectory = localDirectory, DownloadFilesConcurrently = true // Enable parallel file downloads }; await transferUtility.DownloadDirectoryAsync(request); } Use code with caution. Best Practices for Performance Built-in events allow you to monitor transfer progress,

Always use the Async variants (e.g., DownloadAsync ) and await them. Using .Wait() or .Result can lead to deadlocks in many application environments. Best Practices for Performance Always use the Async

The most common use case is downloading an S3 object directly to a local file. This can be achieved with a few lines of code.

For more detailed API references, you can explore the AWS SDK for .NET Developer Guide .

For large datasets, you can utilize TransferUtilityDownloadRequest to gain finer control over the download strategy, such as using (introduced in newer SDK versions).