Is a FritzBox suitable for a company network?

I have been working in a practice for 1 year. The network contains about 4 PCs (+ laptops, printer via Wi-Fi) and we work with professional programs (strong appointments, etc.), which apparently run on the Fritzbox as a server. I don't know my way around this well enough, but these programs run rather slowly with a clear (annoying) delay, and the printer (via Wi-Fi) also reacts slowly after sending the print job.

Is the Fritzbox the bottleneck?

The router is usually not, what about the bandwidth?

No idea what would be standard there?

The Fritzbox is one of the best routers on the consumer market.

There's "better" hardware with more features that you probably simply don't need and therefore offer no advantage.

The network you have is basically smaller than my home.

I exclude the Fritzbox as a direct source of error.

You can't say what exactly happened there.

You would have to have all the details for that.

So nowadays you should already have a 50Mbit line, some even have 100Mbit lines. Then you will probably have a copper line like 90% of everyone else in De hehe.

But the reception is possibly not particularly good either. Do a speed test https://www.speedtest.net/...est.net/de

Wait, I'm confused, you have set up a FritzBox as a server? Which Fritzbox is it?

In general, a Fritzbox is able to operate four devices and one printer, at least in the internal network.

What exactly is reacting slowly? The program on the computer itself or the update on the other computers?

So if two work at the same time in the program on 2 PCs you notice that immediately. Switching from the server to normal Windows is also tough

"Switch from server to Windows normal" is a terminal solution running? What kind of hardware does the server have?

So I don't know the hardware, but when I go to "Strong appointments", a window "Connect to server" opens on the desktop. For example, it is incredibly annoying to and fro between Excel (on the PC) and this server change because there's always a delay of seconds

There's also a "remote PC"… If that helps

Who built the network? You or an IT service provider? If the latter, please contact them, because I just don't really understand what your architecture should look like.

Some marginal employee who "does this". I have no idea whether the IT specialist or Google charlatan… Is on sick leave for a long time…

Do you use the Fritzbox as a file server - with a hard drive connected there?

That is possible, but the Fritzen are only suitable to a limited extent. And if two computers access the same file, it gets very slow - depending on the installation.

A small NAS, e.g. Synology, would be better for such a network.

Then please ask a local specialist to have a look at it on site and give you optimization tips.
And by "specialist" I do not mean the adolescent neighbors' offspring who day and night "World of Warcraft" or the like. Gambling and that's why he "knows about computers".

A professional can actually - as soon as he sees who is communicating with which system, where, and how - quite quickly, where the bottleneck is… The FritzBox is almost certainly not, unless you are still using a rather old FritzBox and / or save your files together on a USB stick connected to the FritzBox via USB 2.0.