TL;DR
Some pdf file exists, but it won't show in file explorer, nor in terminal.
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Sometimes, when I download a file using Chrome (v. 59, 60 etc.), it is saved in my download directory, then it disappears.
It seems to happen only sometimes, if the file is .pdf and is downloaded from my gmail, from Chrome x64, under Linux Mint 17.1 x64.
The download directory is in another NTFS partition. When I remount the partition, nothing changes.
The crazy thing is that the file is still accessible from, say, chrome downloads page, but the file disappears from the file explorer. Not even in terminal can I see the file, using ls -a, but if I try to delete/move/copy it, it works.
Any ideas?