Sony STR-AN1000 Help Manual page 333

Help Guide
Multi Channel AV Receiver/Multi Channel AV Amplifier
STR-AN1000/TA-AN1000
An audio file cannot be played.
MP3 files in MP3 PRO format cannot be played.
If you use a partitioned USB device, only audio files on the first partition can be played.
Playback is possible up to 11 layers (including the root folder).
There are more than 998 folders (including the root folder).
There are more than 998 files.
Files that are encrypted, protected by passwords, etc. cannot be played.
5-037-030-11(1) Copyright 2022 Sony Corporation
333