A USB flash drive is often the most convenient tool to quickly share files between Galaxy S9 or S9 and other devices.
So, in addition to using a micro SD card, you can further expand Galaxy S9 storage with a USB storage.
This Galaxy S9 guide explains to you when you need to use a USB flash drive, the limitations of using USB storage on Galaxy S9, how to use and manage USB storage on Galaxy S9 and S9+.
When do you need to use external USB storage on Galaxy S9 and S9+?
Although you can expand Galaxy S9/S9+ storage with a micro SD card as explained in this guide, sometimes you may find you have to use a USB flash drive or using a flash drive is more convenient than other tools/methods.
For example, if you use two SIM cards on Galaxy S9 or S9+, you then cannot use the micro SD card because slot 2 in the SIM card tray was used by the SIM card already.
Or if you want to share some large videos on your phone with others and you do not want to hand over the phone to that person, you can then directly transfer files from Galaxy S9 to a USB flash drive, or even an external USB drive.
Or when you want to transfer some large files between Galaxy S9 and the PC/notebook without using the USB cable, then a USB flash drive probably is the fastest solution.
Some Galaxy S9 owners also use a USB flash drive to save offline videos and music files. They can use the drive on multiple devices without making copies on each device.
What are the limitations of using a USB flash drive on Galaxy S9 and S9+?
Although a USB flash drive is a plug-and-play (PnP) device, sometimes you may find the USB flash drive simply refuses to work with your Galaxy S9 or S9+.
Before you try to get a USB flash drive for Galaxy S9 or S9, you need to know the following limitations of using such a drive on Galaxy S9 and S9+:
The NTFS file system is NOT supported.
You should format USB flash drive in exFAT file format (or FAT32). By default, most vendors format the drive in FAT32 format when it is shipped out of the factory.
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