Zend certified PHP/Magento developer

How to change a folder so it can be treated a file?

If we have a large folder, with for example 1TB of data and a lot of many files, for example, 1M files, how can we change it, so it can be treated as a file instead of a folder?

I wouldn’t like to be compressing the data because it would require too much time to decompress it. When in Windows we could change the folder name to have a extension, let’s say .dat, and that should do it, but how can we do that on Linux?

We are needing this specially for some cloud storage providers (like GSuite shared drives) which has the limit of 400k files:

A shared drive can contain a maximum of 400,000 items, including files, folders, and shortcuts.