# How to change a run folder name on the NextSeq 500/550

The following are instructions for changing the NextSeq 500/550 run folder name.

1. Close the NextSeq 500/550 Control Software (NCS).
2. Navigate to C:\ProgramData\Illumina\NextSeqControlSoftware\InstrumentShell.NextSeqControlSoftware.Options.cfg
3. Create a backup copy of this config file.
4. Edit the following line to update the instrument name, add experiment name, etc.:

* ![](/files/KTjq1MlluB8L8MHWYjkN)

5. Launch NCS.

Example for adding experiment name is as follows:\
{YY}{MM}{DD}\_{SERIAL}\_{RUN}\_\_A{FCSERIAL}\_**{EXPERIMENT}**/RunIDTemplate>

**Note**: The experiment name is pulled from the sample sheet. As such, this will not work for runs setup in manual mode.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #2087), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000002087%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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