I have one of these:
hanging off my MBP. Two ports are occupied by a mouse dongle (Logitech) and a USB-to-SATA adapter that I use for external 2.5" SSDs. Sometimes I have projects going that use USB to communicate with homebrew devices, and the other two ports are used for that. I've not had any issues with insufficient power, but I don't think I've ever had all four ports going at once.
Anker 4-Port USB 3.0 Ultra Slim Data Hub for Macbook, Mac Pro/mini, iMac, Surface Pro, XPS, Notebook PC, USB Flash Drives, Mobile HDD, and More
Anker 4-Port USB 3.0 Ultra Slim Data Hub for Macbook, Mac Pro/mini, iMac, Surface Pro, XPS, Notebook PC, USB Flash Drives, Mobile HDD, and More
www.amazon.com
hanging off my MBP. Two ports are occupied by a mouse dongle (Logitech) and a USB-to-SATA adapter that I use for external 2.5" SSDs. Sometimes I have projects going that use USB to communicate with homebrew devices, and the other two ports are used for that. I've not had any issues with insufficient power, but I don't think I've ever had all four ports going at once.