# 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.:

* ![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-08776932db18892c2bac158e451968787f7ad38d%2Fimage1.jpg?alt=media\&token=cf8c1c28-5be1-43d1-840a-5f57a2d52711)

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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