"How to delete "documents and data" in Messages?: Could someone tell me how to delete Documents & Data under Messages? I've deleted nearly everything there is to delete, but that category is still taking up almost 10 GB. Clicking on "other" below leads to a blank screen with nothing to select or delete."
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Deleting "Documents and Data" in Messages:
A. Tap "Review Large Attachments":
So, what happens when you tap "Review Large Attachments"? If you do not need the thread, then trash it, and all would go away from it.
B. Using a Mac to Locate and Perform the Deletion:
IF you were to pair with you a Mac, then using the Messages app, you can delete these with ease. Elsewise, it's a matter of sorting through these files manually. So, if a Mac is available to you, see about pairing it > download what need be > trash the item. You'd right-click on the attachment, and then click "Delete..." > then., click the "Delete" button to approve of this deletion.
Screenshot: