How can I exchange USDC to currencies like € or $?
Storj cannot make specific recommendations of which exchange you should use. USDC is one of the most widely traded stablecoins, and most major exchanges offer direct trading between USDC and fiat currencies such as USD and EUR. You can find the exchanges that trade USDC listed here or here.
Please note that gas prices for sending your USDC to an exchange may vary greatly, so please be sure to check the current rates on Etherscan Gas Tracker before proceeding. It may be better to wait for gas prices to drop before sending your transaction. Make sure you send your USDC on the Ethereum network to an exchange deposit address that accepts USDC on Ethereum.
Be aware that centralized exchanges will most likely require you to first pass KYC requirements before you can start trading.
You can try first with a small amount of USDC if you are not sure how it works at first. In any case, please do not leave your funds for extended periods of time on a centralized exchange that does not let you hold your private keys yourself. All exchanges can be targets of hacking attacks at any time, so best to just complete your trade quickly and withdraw your funds to your own wallet or bank account. Also, before you use a centralized exchange that works for your country, be sure to find out if they have any restrictions on how much or how fast you can withdraw your funds, if this requires KYC and what fees they will charge, otherwise you may have some unpleasant surprises later. Please use the exchange services' support forums for further help, we cannot give you support here for all the existing exchanges in the world, that is outside the scope of this project.
If you still hold STORJ tokens from earlier payouts, the same advice applies. You can find the exchanges that trade STORJ listed on CoinGecko.