There are multiple factors, both internal and external to InDesign application, that can lead to document corruption. However, we can take a look and see if the file can be repaired. Please email your InDesign file to firstname.lastname@example.org. We will take a look at the document.
If the file is larger than 10 Mb, you can zip (and password protect) the file and upload to Creative Cloud account (or Dropbox/Wetransfer/GoogleDrive) and send us the document link.
Adobe InDesign teammatthew018 commented
InDesign Automatic Recovery Feature
InDesign automatic recovery feature mainly works in situations like if your InDesign shut down unexpectedly due to system errors, power outage or any other issue etc. with this feature you can retrieve these documents.
About InDesign Automatic Document Recovery
If you do any modification in the InDesign document, InDesign regularly performs a mini –save of the changes. These changes are getting stored in some temporary file inside the InDesign recovery folder.
Adding changes to the document and then saving the document with File > Save option will deletes the temporary file every time. If all of a sudden InDesign gets shut down then InDesign attempts to use these temporary files to recover InDesign document’s unsaved changes.
InDesign Recovery folder contents
Every user account has separate InDesign recovery folder. If InDesign don’t locate the InDesign recovery folder at the beginning then it re-creates the folder.
It is a first temporary file that gets listed when you view the content of the InDesign recovery folder by name.
dbt [random alphanumeric character]:
It’s a temporary file with mini-saved information for every opened InDesign documents. The name of these temporary files begins with “dbt”
This log file is getting created if InDesign crashes due to an access violation. Well this log file is specifically for identifying a specific plug-in that may have generated the error.
This file is an index for all open InDesign document and crashed documents, including their full path names. List of open documents contains path not aliases, means InDesign is not able to recover files you move or rename after the crash.
For more Information - filerepairtool.net/blog/fixes-for-corrupt-or-deleted-adobe-indesign-file-recovery