# USB access problem on a server

**URL:** <https://community.blockcerts.org/t/usb-access-problem-on-a-server/3511>\
**Category:** Support\
**Created:** [November 21, 2023, 8:42pm UTC](https://community.blockcerts.org/t/usb-access-problem-on-a-server/3511 "2023-11-21T20:42:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ely](https://avatars.discourse-cdn.com/v4/letter/e/87869e/32.png) [@ely](https://community.blockcerts.org/u/ely)\
**Post date:** [November 21, 2023, 8:42pm UTC](https://community.blockcerts.org/t/usb-access-problem-on-a-server/3511/1 "2023-11-21T20:42:27Z")

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Hello  
I am trying to use cert\_issuer on a server, but I don’t know how to use the USB on which I store my private key to sign certificates.

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**Author:** ![Helen](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/helen/32/916_2.png) [@Helen](https://community.blockcerts.org/u/Helen)\
**Post date:** [June 23, 2024, 6:18pm UTC](https://community.blockcerts.org/t/usb-access-problem-on-a-server/3511/2 "2024-06-23T18:18:24Z")

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Hello @ely 👋

First; make sure the USB device is attached available on your server.

then next; set cert\_issuer to look for the private key file on the USB drive. You may need to provide the precise path to the secret key file in your cert\_issuer setup.  
make that the USB drive permissions allow the server to acquire data from it.  
Once set up cert\_issuer should be able to verify documents using the private key stored on the USB drive.

I hope this will helpfull for you 👍