You can use this guide: Graceful Exit Guide
If your undistributed earnings is less than 4x of current fee (or 9x if a new proposal would be implemented), I would recommend to enable zkSync to receive a final payout in the next payout period.
Regarding converting to fiat you can read this article: https://support.storj.io/hc/en-us/articles/360031990652-How-can-I-exchange-STORJ-tokens-to-currencies-like-or-