When comparing OI File Manager vs MK Explorer (File manager), the Slant community recommends OI File Manager for most people. In the question“What are the best file explorers on Android?” OI File Manager is ranked 9th while MK Explorer (File manager) is ranked 23rd. The most important reason people chose OI File Manager is:
It asks only for Storage permissions. No other things are required.
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Pros
Pro Few permissions
It asks only for Storage permissions. No other things are required.
Pro Lightweight
The app takes only a few seconds to download, as its size is only about 1.5 MB to download and installed (on MIUI) takes only ~6 MB full size.
Pro Open Source
OI File Manager is available for free under the Apache License 2.0.
Pro ZIP file extraction support
OI File Manager supports extracting ZIP files.
Pro Root file access and editing
MK Explorer (File manager) offers root access to root users so they can edit root files.
Pro UI designed for phones and tablets
The UI for MK Explorer has a useful layout for phones as well as tablets.
Pro Material Design
MK Explorer (File manager) uses Material Design for its user interface.
Cons
Con No additional features (suite)
No other features such as networking connections, junk flies cleaner, built-in media player/viewer/editor. But that might be a pro, since nothing else is asked for this app permission.
Con Outdated
At this moment I'm writing, it was updated last in 2017.
Con Ugly UI
The GUI is old and deprecated. But what would you expect for such a small app?
Con NO USB OTG support
MK Explorer (File manager) is unable to access files on external USB devices through OTG.