Stock Android smartphones are undoubtedly the most fashionable and trending techologies in 2017. While this technology was first started from high end smartphones like Google Pixel and Pixel XL, but later it was carried away with Mid-range smartphones like Moto G4 Plus and Xiaomi Mi A1 and Moto G5s Plus. But at the later end otf this year, Stock Android became even poular in budget-ranged smartphones like Moto C Plus.
Stock Android is nothing but a Custom ROM template which has no company's UI and it saves a lot of battery and efficiency as it has no additional apps and bloatwares. Talking about the apps, it sometimes doesn't give basic apps that will be required. For example, File Explorer. Now under these circumstances, when you need to transfer files from a stock Android smartphone without a default File Explorer, it get's very difficult to play with files. But, I have found out a way where you could also transfer files to your OTG (On-The-Go) Pendrives:
Download any third-party File Explorer app else if you don't want to download any File Manager app then Go to Settings> Storage> Internal Storage> Explore.
Plug in your otg. A notification pops.
Click on explore in the notification.
Now you can easily switch between your internal memory, sdcard, otg by using options.
You can easily copy and move files between the storages.