Box
Box is an all-in-one platform for cloud storage, that offers file sharing, syncing, e-signatures, collaboration and other services.
You can use Box as a source for Import, as a target for Export, and as source and target for Data Flow.
Establishing Connection
To create connection with Box, sign in with your Box account.
Create Connection
To create a Box connection, perform the following steps:

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Click Sign In with Box.

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Enter your Box credentials.

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Click Grant access to Box and save the connection.
Connector Specifics
Access to Files
Files on Box are accessed not by a file name, but by their unique IDs. This causes the following behavior: if you replace a file used in an import on Box, you will need to edit the integration and reload the source file in it. Otherwise, the import won't be able to find the new file with the same name on Box when running next time.
Useful Links
Box integration with Salesforce