S3Express: Amazon S3 Command Line Utility

Amazon S3 command line utility for Windows. Copy, query, backup multiple files to S3 using the Windows command line.

S3Express FAQ and Knowledge Base

Main Page > Browse Categories > Release History > Version 1.5.7 (Nov 2015)

Version 1.5.7 (Nov 2015)


  • Fixed issue with possible >4GB corrupted files after upload.


  • When using -onlydiff with the command put, S3Express now calculates the MD5 value of local files only if a matched file name on S3 is found. This speeds up the comparison and upload.
  • -onlydiff now working also for large files >4GB.
  • New MD5 calculation for multi-part upload mode matching the Amazon S3 calculation.
  • -nomulmd5 option of command put now used only for files <1GB to speed up upload.
  • -nomd5existcheck of command put now used only for files <200MB to speed up upload.

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