I work for a non-profit organization in a 4000 sf office with 30 staff. All laptops are connected to the network wirelessly. We have one switch (TP-Link TL-SF1008D Ethernet Switch) and three routers that function as AP (TP-Link TD-W891ND), with one of the routers functioning as the modem. Primary activities include e-mails, Dropbox, and downloading/uploading documents.
We have just recently upgraded our Internet package to 12 Mbps (as advertised), but the Internet connection is still very sluggish most of the time, even with less than half of the staff in the office. A lot of people can't connect to the APs, reliably, and even when they do, the connection is slow.
I have a feeling that the problem has more to do with network setup rather than bandwidth. Can anyone point me to the right direction on what I need to look for on troubleshooting?