Short answer: you don't. The USB mass storage device can only be used to access pictures (at least as far as I have been able to use one). Long Answer: Don't know how you got a save game file onto the USB device, if it was from a PC then you won't be able to access the file from the Xbox 360 as the two have different file types for games.
file
Title Bar.
Storage and placed in memory
file is one of the storage device
read to the file
Putting documents on your flashdrive (a USB storage device) is as simple as copying any file on your computer to an enumerated USB Flash Drive using drag-and-drop file listings. Alternatively any program that creates documents gives you the option to write the document to the Flash Drive using its "save as" command. Documents saved on a Flash Drive can opened, edited, then saved back to the storage device without the document being saved to the computer's hard drive.
When a file is saved for the first time, the user typically specifies a name and a location on their device or cloud storage where the file will be stored. The operating system then creates a new file in that specified location, allocating the necessary space on the storage medium. The data contained within the file is written to this newly created file, allowing for future access and modifications. This process also establishes the file's format based on the application used to create it, ensuring compatibility for opening and editing later.
copy and paste
You can get the saved game of Clash of Clans on android after erasing the game file on the device by going to the app store and re-downloading it.
To enable USB storage mode on your device, connect your device to a computer using a USB cable. Then, go to the settings on your device and look for the option to enable USB storage mode or file transfer mode. Select this option to allow your device to be recognized as a storage device on the computer.
The file systems are helpful to categorise and organise the files in a secondary storage device.
network attached storage for file sharing between computers