default or selected kernelversion does not have config value CONFIG_USB_FILE_STORAGE.
Result is shown for kernelversion 6.2.5
File-backed Storage Gadget (DEPRECATED)
modulename: g_file_storage.ko
configname: CONFIG_USB_FILE_STORAGE
USB Gadget Drivers
└─>File-backed Storage Gadget (DEPRECATED)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
The File-backed Storage Gadget acts as a USB Mass Storage
disk drive. As its storage repository it can use a regular
file or a block device (in much the same way as the "loop"
device driver), specified as a module parameter.
Say "y" to link the driver statically, or "m" to build a
dynamically linked module called "g_file_storage".
NOTE: This driver is deprecated. Its replacement is the
Mass Storage Gadget.
disk drive. As its storage repository it can use a regular
file or a block device (in much the same way as the "loop"
device driver), specified as a module parameter.
Say "y" to link the driver statically, or "m" to build a
dynamically linked module called "g_file_storage".
NOTE: This driver is deprecated. Its replacement is the
Mass Storage Gadget.