Right now, there is no accurate way to determine if a file is identical, but uploaded with a different name inside a Marketo instance. While you can pull file size and try to 1:1 compare sizes to understand if a file is identical, this is an imprecise method.
By storing some sort of checksum hash (MD5, SHA-2, etc.) with an asset, there's now several options for handling duplicate files. Uploads via API or UI could use the checksum to prevent duplicate uploads, and exposing the checksum via API (or even UI in some way) would allow for faster and more accurate detection of existing duplicate files.
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