I agree with Infopro to the extent that you need a new host.
Now regarding "unlimited", there is no such thing and that is a common
misconception among mostly naive users with little understanding of
what they are really getting. Unfortunately, you have a lot of hosts
who usually from lack of experience or trying to exploit these users as
a niche market cater to fueling that misconception.
In a nutshell ...
Unlimited does not mean infinite storage and bandwidth, it just simply means
that your host is not monitoring your individual usage or more specifically
did not setup any specific forced limits in advance. It does not mean that
you do not have any limits, just that they aren't setup ahead of time in
your account specifications but you are still subject to all physical limits
of the hardware resources and network bandwidth available and you can
be sure that your host will delete you if you use excess resources beyond
the typical average share of other users or otherwise make an impact in
their finite resources available to other users.
There is no such thing as "infinity drives" or "endless bandwidth" (I wish!
)
It would be far more accurate to say "unmetered" than "unlimited" for these
hosts who choose to cater to the misconception and delusion of these users
as that is really what it is all about. They don't offer users endless resources
but rather just don't set any predefined imposed software limits.
The point to be made is that you are always subject to the physical limits
of the hardware and network capacity of the equipment where you are
hosted and that is not likely going to change. Also, no host no matter
what they advertise is going to let any single user utilize their entire
service capacity and capabilities.
You would be gone in a heartbeat -- end of story!
Now regarding the number of files you have in one folder, that is indeed
going to slow down performance of your account just because of the
physical hard drive indexing and you could crash the file manager
application since it's not the greatest handling that anyway. That said,
you have other options such as FTP which is far more equipped to handle
larger files and greater numbers of files in a given folder than any web based
file manager that exists.
Your host is wrong in that there is no "200 file limit" but at the same time,
I would recommend moving some of those files into separate sub-folders
as this will help the performance of your account and the hard drive heads
reading the files from your account and perhaps even make it so you can
continue using the file manager although like I said, FTP is better.
Infopro pretty much summarized everything but this should give you more
of the technical understanding behind why Infopro said what he said which
I fully agree with wholeheartedly incidentally.