[Lumier]

Hi there,
I just purchased a boox go with the ultimate goal of using it as my one-and-only music library running msp.
I am scratching my head over a seemingly trivial issue: I have copied the entire existing music library (not msp format, just a medium sized directory structure containing a mix of pdfs, abcs, jpegs, you name it) from my current tablet to a usb stick and plugged the stick via a docking station into the Boox Go. The Go can see and navigate the entire file structure perfectly ok, no probs.
I now want to copy the entire tree as is from the stick to the Go's local storage. Does not appear to be possible with the built-in tools. There is a selection tool in the storage UI, but that will allow you to select files only, not directories. Needless to say, manually generating every single subfolder in the Go's file structure manually and then copying each file individually is not an option. 
do I need to install a file manager app to do something as rudimentary as that? If yes, which one is the most straightforward? Or did I overlook something obvious?
I see that someone on reddit asked pretty much the same question but never got a useful answer.
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o copy entire directories from your USB stick to the Go's local storage, you will likely need a file manager app. The built-in tools usually don't support directory-level operations effectively.
I recommend trying a file manager like X-plore File Manager or Total Commander. These apps are straightforward and support copying entire directories with their subfolders. They should make the transfer process much smoother.