# Question regarding "StorageCompression" option.

**URL:** https://discourse.orthanc-server.org/t/question-regarding-storagecompression-option/2264
**Category:** Google Groups archive
**Created:** [January 14, 2021, 7:29am UTC](https://discourse.orthanc-server.org/t/question-regarding-storagecompression-option/2264 "2021-01-14T07:29:06Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![ranasrule](https://discourse.orthanc-server.org/letter_avatar_proxy/v4/letter/r/3e96dc/32.png) [@ranasrule](https://discourse.orthanc-server.org/u/ranasrule)
#### Post date: [January 14, 2021, 7:29am UTC](https://discourse.orthanc-server.org/t/question-regarding-storagecompression-option/2264/1 "2021-01-14T07:29:06Z")

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If I set “StorageCompression” to true what affect if any does this have on currently stored instances ie those that were in Orthanc before “StorageCompression” was changed to true ?

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### Author: ![jodogne](https://discourse.orthanc-server.org/user_avatar/discourse.orthanc-server.org/jodogne/32/1511_2.png) [@jodogne](https://discourse.orthanc-server.org/u/jodogne)
#### Post date: [January 14, 2021, 7:56am UTC](https://discourse.orthanc-server.org/t/question-regarding-storagecompression-option/2264/2 "2021-01-14T07:56:10Z")

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Setting “StorageCompression” to “true” will only affect new instances.

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### Author: ![ranasrule](https://discourse.orthanc-server.org/letter_avatar_proxy/v4/letter/r/3e96dc/32.png) [@ranasrule](https://discourse.orthanc-server.org/u/ranasrule)
#### Post date: [January 14, 2021, 8:52am UTC](https://discourse.orthanc-server.org/t/question-regarding-storagecompression-option/2264/3 "2021-01-14T08:52:48Z")

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thank you for the quick reply…cheers