Faster Amazon S3 Uploads and Downloads with CS Browser Pro
CS Browser
Free Windows client for Amazon S3 and Amazon S3 compatible storage services
 
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Faster Amazon S3 File Transfers

Why CS Browser Pro Transfers Files Faster

CS Browser Pro can run many uploads and downloads in parallel, while the Free version is limited to two concurrent uploads and two concurrent downloads.

This additional parallelism can significantly reduce the total transfer time, especially when transferring large batches of small files or using multipart transfers.

The level of concurrency is configurable, allowing CS Browser Pro to make efficient use of fast network connections and adapt to different workloads.

Transferring Many Small Files

Pro Version

Multiple small files uploading at the same time in CS Browser Pro
The Pro version allows you to upload and download multiple files at the same time.

With CS Browser Pro, multiple files can be uploaded or downloaded at the same time. A large batch does not have to wait behind only one or two active transfers.

More parallel transfers mean less waiting. They also help make better use of a fast network connection.

Multiple small files uploading at the same time in NetLimiter
Screenshot from NetLimiter showing how CS Browser Pro utilizes the network connection.

Free Version

Two simultaneous small file uploads in CS Browser Free
The Free version is limited to two simultaneous uploads.

CS Browser Free is limited to two concurrent uploads and two concurrent downloads. On high-latency connections, two active requests may leave much of the available bandwidth unused.

Two simultaneous file uploads in NetLimiter
Screenshot from NetLimiter showing how CS Browser Freeware utilizes the network connection.

Large Files and Multipart Transfers

Amazon S3 multipart upload splits a large file into parts that can be transferred independently and in parallel. If one part fails, only that part needs to be retried.

CS Browser enables multipart uploads and downloads by default. The default part size is 100 MB and can be changed in Tools > Options > General.

CS Browser Pro processes multiple file parts in parallel, while the Free version is limited to two upload or download threads. On fast connections, additional parallelism can considerably reduce transfer time for large files.

Pro Version

Parts of a large file uploading simultaneously in CS Browser Pro
Multipart Transfers: Small parts of a large file are uploaded or downloaded simultaneously.

Multiple parts are uploaded or downloaded simultaneously, allowing CS Browser Pro to keep more of the available bandwidth in use.

Multiple simultaneous transfer connections in NetLimiter
Screenshot from NetLimiter showing how CS Browser Pro utilizes the network connection.

Free Version

Two parts of a large file uploading simultaneously in CS Browser Free
Multipart Transfers: The Free version is limited to two simultaneous uploads or downloads.

Only two parts can be uploaded or downloaded concurrently. Additional parts remain queued until one of the active transfers finishes.

Two simultaneous transfer connections in NetLimiter
Screenshot from NetLimiter showing how CS Browser Freeware utilizes the network connection.

Configure Concurrent Transfers

Open Tools > Options > Queueing.

Tools menu with Options selected
Tools > Options

Set the maximum numbers of concurrent uploads and downloads, then click Save Changes.

CS Browser Queueing options
CS Browser Queueing options

Higher values can improve throughput on fast, high-latency connections, but excessive concurrency may reduce performance. Adjust the values to suit your network, storage service and hardware.

CS Browser 13.5.5 Freeware
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"CS Browser is an invaluable tool to me as a web developer to easily manage my automated site backups" -Bob Kraft, Web Developer

"Just want to show my appreciation for a wonderful product. I use CS Browser a lot, it is a great tool." -Gideon Kuijten, Pro User

"Thank You Thank You Thank You for this tool. A must have for anyone using Amazon S3!" -Brian Cummiskey, USA

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CS Browser is developed by Netsdk Software FZE and is not affiliated with, endorsed by, or sponsored by Amazon or AWS. Amazon S3 and Amazon S3 Glacier are trademarks of Amazon.com, Inc. or its affiliates.
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