NAS on my old Laptop - some General Questions

Hello, im completly new to making an own NAS. I want to use my old Laptop with an i5 6200U, 16GB RAM and the storage is one of my general questions. I think the hardwarepower is more than enough for a NAS.

- I want to use my 256GB Disk to install the whole thing on it. But my Laptop has only 1 Sata-Port. So is it possible to use a second Disk with (Sata) over an USB-adapter and connect it over USB? So i mean the whole thing works over my first disk and the second disk is like a storage expansion.

- When i use disks over USB, can i unplug them (more or less) easily? So i mean, can i unplug one disk and connect another? I mean really a fat32/exfat external harddrive where is no OS installed or sth prepared for OMV. Is this possible with openmediavault ? And for sure this storage should then be visible for me, when i acces on the NAS-storage.

- Can OMV use something like C-States? So i mean, will it be able to send my CPU to sleep mode (because of powerconsumption).

- Doing things after installing OMV: As i said im new in that topic. So can i install a "basic" OMV and then afterwards configurate different things? Things like clock speeds, when my CPU shall go to sleep, undervolting, maybe a sync-service and so on. Or do i have to do that all on my "install-process" ? Because it would be a lot easier, when i don't have to know all things at the beginning. When i can make one by one, then it would be very helpfull for a beginner.

- If this is not the case, what should i have in mind to not forget?

Ah, this answer was fast, thanks.

Ok, how can i see, if my CPU is WOL compatible? I guess it is.

But why should i realise, that i need something else? The hardware has more power than any other standart-NAS and i dont need more Storage (or for this case the question about connecting an fat32 external harddrive). I Have some datas which i could use very rarely. But beside that, i dont need more than 256GB or 512GB.

But can i isntall other disks after i have set up OMV? So when i think in a year i need another 256GB, can i add that disk over USB without a reinstall? (thought to be NOT disconnected. So it will be never deplugged.)

So wait, is it though to install OMV on the same disk which is used for Storage ? I will use one Disk and this disk is for the OMV and for Storage. This will work well, right?

But an USB-Stick is not really a safe thing to use for 24/7 device?

Seems not really safe for me.

And does a slow USB-Stick then affects the NAS-Speed? I guess?

Absolutely not safe or absolutely safe ?

Ok, and does a slow USB-Stick has any affect on perfomance (after Boot) ? And when it wakes up from sleep mode, is this handled by the USB-stick? So a faster USB-Stick means faster wake-up?

How big do you reccoment an USB-Stick has to be, if you might install some plugins and so on? 16GB is to less then probably?

Ah yes, and i forget to ask: Can i disable the display of the laptop or do i have to disconnect it physical?

Ok

Yeah, i have only 16GB or 64GB, but i will decide later that.

And ok, but is there (in this forum or elsewhere) a step to step guide how to set up an NAS with Intel-Hardare? I have found already some guides but not here. But i guess every turtorial more is more information for me to learn and understand. So maybe you know something where you can say, this is a very good turtorial.

Yeah i know, i want to make sure, the display is not active and consuming power. But i can deinstall it physically at last possibility.

Thanks for your help btw