Sony STR-DH770 Manual page 44

The receiver does not play coded files such as DRM.
The receiver can recognize the following files or folders in USB devices:
folder paths up to 128 characters long
200 folders (including the root folder)
150 audio files in each folder
The maximum number of audio files and folders may vary depending on the file and folder structure.
Do not save other types of files or unnecessary folders on a USB device.
Some USB devices may not work with this receiver.
The receiver can recognize Mass Storage Class (MSC) devices (such as flash memory or an HDD).
Compatible USB device
Mass Storage Class
Maximum current
1 A
Verified Sony USB devices
You can use the following Sony USB devices on this receiver:
Walkman:
NW-A16/A17/A25/A26/A27
NW-W274S
NW-WH505
NW-WS615
NWZ-A15/A17
NWZ-B162/B162F/B163F/B172/B172F/B173/B173F/B183F
NWZ-E053/E363/E364/E365/E373/E374/E375/E383/E384/E385
/E454/E463/E464/E465/E573/E574/E575/E583/E584/E585
NWZ-F805N
NWZ-F885/F800 series
NWZ-M504
NWZ-S773/S774/S775
NWZ-W252/W273/W274S
NWZ-WH303/WH505
NWZ-WS613/WS615
NWZ-Z1050
MICROVAULT:
USM4GP/8GV/32GP
USM8GT/64GT
USM64GU
Digital Voice Recorder:
ICD-FX88
ICD-PX232/PX240/PX440
ICD-SX733/SX734/SX813/SX1000
ICD-TX650
ICD-UX533/UX533F/UX534F/UX543/UX543F/UX544F
ICZ-R51/R100
PCM-D100
Note
The receiver is unable to read data in NTFS format.
The receiver is unable to read data other than that saved in the first partition of a hard disk drive.
Operation of models not listed here is not guaranteed.
Operation may not always be guaranteed even when using these USB devices.
Some of these USB devices may not be available for purchase in certain areas.
When formatting the above models, be sure to format using the model itself or the dedicated
formatting software for that model.