For those of you who are installing custom ROMs on your rooted Android smartphones or tablets, there may be a time where you may end up with no OS (Operating System/ROM) booting or a bootloop.
Now, these cases are very easy to solve if you have ROM backups or have custom ROM files on your device. If you don’t, usually you can use a microSD card to solve the issue and copy over the ROM files you need to get your Android device up and running.
Wait, but what if you have an Android device without external microSD card slot such as a Nexus 4, Nexus 5, Nexus 7, Nexus 10, or even Kindle Fire 8.9???
Well, so long as you have CWM or TWRP recovery installed on your device, you can use ADB commands to copy files over. If you don’t have CWM or TWRP recovery installed, you can use fastboot commands to install that also.
Presuming you have CWM or TWRP recovery installed (since you probably got stuck while installing a new ROM), here’s how to copy files over to your Android in a bootloop with no OS installed using ADB! This can also be handy when you don’t have a microSD around even if you have a microSD slot.
*Note – With TWRP recovery, you can use an OTG Flash drive if you have one!
Step 1. Boot into your TWRP or CWM Recovery on your Android device. TWRP or CWM Recovery has recovery ADB functionality, which means ADB commands work while your Android device is recovery mode.
Connect a micro-USB cable from your Android device to your computer.
Step 2. If you have Mac or Linux, skip to Step 3 as you do not need drivers. If you have Windows, open Device Manager and check for “Android ADB Interface”.
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