Linux – Mount ext4 USB flash drive to Raspberry Pi [New Question]

See the new question, answered, on Heelpbook, titled:

Linux - Mount ext4 USB flash drive to Raspberry Pi

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Linux - Mount ext4 USB flash drive to Raspberry Pi
Description
A quick question, answered on Heelpbook, about "Mount ext4 USB flash drive to Raspberry Pi", especially useful when attaching external storage, HDDs or SSDs, to a Raspberry PI (or any Linux-based system) to expand storage for applications and services.
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Heelpbook.net