You can view the list of files and folders in the form of large icons, and can be changed its the icon size(ratio).
In the Settings tab
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Go to the Settings tab and select List.

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Select View.

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Set it to Icon.

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A file and folder list is viewed as an icon.

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Select Icon Style to set its size(ratio).

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You can select a size(ratio) of the icon on the list.
– 1:1, 3:4, 4:3

In the list
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Tap more(…) icon on the upper right of the list.

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Select View.

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Set it to Icon.