# S3 Compatible Storage - The stream does not support concurrent IO read or write operations

**URL:** <https://forum.duplicati.com/t/s3-compatible-storage-the-stream-does-not-support-concurrent-io-read-or-write-operations/14003>\
**Category:** Support\
**Created:** [February 24, 2022, 10:43am UTC](https://forum.duplicati.com/t/s3-compatible-storage-the-stream-does-not-support-concurrent-io-read-or-write-operations/14003 "2022-02-24T10:43:33Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![gsalin](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/g/8c91f0/32.png) [@gsalin](https://forum.duplicati.com/u/gsalin)\
**Post date:** [October 23, 2022, 11:49am UTC](https://forum.duplicati.com/t/s3-compatible-storage-the-stream-does-not-support-concurrent-io-read-or-write-operations/14003/4 "2022-10-23T11:49:49Z")

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testing few configs from other posts of this forum solved the problem :  
s3-ext-signatureversion had to be set to 2 instead of 4…

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