What is Bud1% @ @ @ @E%DSDB` @ @ @?

OK, I found what it is. One of the Google search results pointed to this Which contains the following:

Bud1  ... @Ђ @Ђ @Ђ @E DSDB `Ђ @Ђ @Ђ @

Interestingly, the file is a .DS_Store file! I checked a few .DS_Store files and they all contained the mysterious characters. These (hidden) files are generated automatically by Mac OS X. So the client should have accessed the folder from console and caused the creation of the hidden DS_Store (remember it's an intranet).

This is information that the Finder (Mac equivalent of Windows Explorer) stores about files and folders. The best description of the format I found was here:

https://metacpan.org/pod/Mac::Finder::DSStore

The format is described as:

The .DS_Store file holds a series of records giving attributes of the files in the directory or of the directory itself (referred to as .). These records are stored in a B-tree, and the pages of the B-tree are stored in the file by a "buddy allocator" along with a small amount of metadata. The allocator also provides a level of indirection, from small integers to file offsets, presumably allowing blocks to be relocated as they grow and shrink.

For people that is still getting trouble with this in your application (after removing a file in my case), I solved it by removing recursively the .DS_Store files in the project folder.

On terminal, go to the project:

cd to/your/directory

And just type:

find . -name '.DS_Store' -type f -delete

credits to Jon Bellah on his blog https://jonbellah.com/articles/recursively-remove-ds-store/