How to fund Polygon storage apps from Ethereum

To pay a storage service that runs on Polygon, move a supported token from Ethereum to Polygon, then pay through the service’s app. Polygon is a blockchain, not a place where large files are usually kept. A storage app may use Polygon for payments or records while keeping the files elsewhere, so check what the service stores and what its fee covers before sending funds.

How do I move funds from Ethereum to Polygon?

Use a bridge that supports the token and Polygon network the service requires. Polygon’s Portal provides a route between Ethereum and Polygon PoS. On a typical deposit, the bridge locks the token on Ethereum and creates a matching representation on Polygon. For a fuller explanation of the options and their trade-offs, see this beginner’s guide to Polygon bridge routes. A transfer can involve more than one transaction, and fees depend on network conditions.

Before you start, check the service’s payment instructions. It may accept a stablecoin, ETH, or another token; the token you hold on Ethereum might not be the one the app accepts on Polygon. In the bridge interface, confirm the source is Ethereum, the destination is the right Polygon network, and the destination address is yours.

Which tokens and fees do I need?

You need a token the service accepts, plus POL for transaction fees on Polygon PoS. Polygon uses POL as its gas token, meaning it pays for actions such as sending a payment or approving a token. If you bridge ETH, the Polygon-side ETH representation generally cannot cover those fees. Keep a little POL in the same wallet before trying to pay or swap.

• ETH on Ethereum to pay for the bridge transaction and any token approval.
• The payment token the service accepts on Polygon.
• POL on Polygon PoS for the app’s on-chain actions.
• Extra funds for fees, which vary with network activity and the route.

If you have only ETH, check whether the bridge route offers a way to receive POL or whether you can arrange POL separately. A token approval gives a contract permission to move tokens up to an amount you set; review the token and amount in your wallet before signing. Don’t assume that having enough value in ETH means you can complete every step.

Does Polygon store the files?

Usually, the chain handles payments or records while a separate system holds the files. Ethereum.org’s guide to decentralized storage explains that applications often put a file’s reference or hash—a short digital fingerprint—on a blockchain while storing the file off-chain. The exact arrangement depends on the service. Ask how long it keeps data, what happens if payment ends, and how you can retrieve your files.

The practical order is simple: confirm the service’s network and accepted token, bridge only what you need, keep POL aside for fees, then follow the service’s payment steps. That funds the Polygon transaction; it does not by itself prove that a file will stay available.