Visit https://obyte.org and download a wallet. For selling Blackbytes we recommend using a desktop wallet (Windows, Mac or Linux).
This will add the Blackbytes.io bot to your Obyte wallet
To sell you just need to type 'sell' followed by the 'number' of Blackbytes you wish to sell followed by your 'wallet address', so the format is sell [amount] [wallet_address]
In the above example we are requesting to sell 1 GBB of Blackbytes and the wallet address is MKOVDDQTUN7OBIPSKIG7DFX3XH6GTJPM
This is entered as sell 1g MKOVDDQTUN7OBIPSKIG7DFX3XH6GTJPM
(Note that 0.1 is the minimum order. The 'g' means Gigabytes of Blackbytes, so in the above example we are putting in a sell order of 1 Gigabytes of Blackbytes).
Click the 'payment request' link. This will bring you to the 'contract' screen.
The contract is now displayed. In this example we will be selling 1GBB (Blackbytes) for 0.02982GB (Bytes). Scroll down to view the payment button.
Click 'SEND PAYMENT' button
Your Bytes will be delivered to the Bytes section of your wallet which you can access from the 'HOME' tab inside the Obyte wallet. Delivery usually happens within 20 minutes.