@EarlyAnxious Thank you so much for sharing your datapoints! Similar to you, the scanned paperwork that we mailed in was uploaded as a 30MB TIFF file the day after the case showed up online.
Interestingly this uploaded TIFF file did not include any of the filled out USCIS application forms not even the N400 but only the 19 pages of supporting documentation we mailed (green card scan, birth cert, marriage cert, IRS tax transcripts).
I do however have BAD NEWS to share- it looks like starting April, USCIS is discontinuing biometrics reuse for paper filed N400 applications thru the extreme vetting policy implementation.
Changing out the last digit of our IOE case number confirms that many other N400 paper applications who have also filed after usa are being sent in-person ASC biometrics appointments.
Given the current administration's immigration policies, I would not be surprised if online filed N400's in the coming weeks or months start going the same route of requiring in-person biometrics appointment, with the common sense biometric reusability policy starting to disappear altogether.
3/14- Mailed paper N400 for reduced fee
3/18- USPS delivered to USCIS lockbox
4/3- Credit card charge, case number shows up on USCIS online account with 3/18 priority date (no text no email)
4/4- Scanned N400 supporting documents available for download
4/6- Biometrics appointment scheduled for 4/23 (no re-use!!!!)