I am streaming , how can I play music when provider goes down.

Hello To all ,I just have a fanless computer  running Roon,qobuz and separate dac 

i will purchase whatever is needed , I am just building a reference digital system

it bugs me to be crippled ,every time spectrum goes out 

when I have 1Terabytes of Flac files on a Solid state drive ,

much appreciated with any all help !!

I only use Flac files no fm tuner, or phones I want to be able to access my Flac files 

how to access them ,and how to play files and pick music to play ,

when my service provider is down ?

iwas even thinking in the future like my friend to spend $500 for the Tesla starling setup then pay the $100+ for music and Audio , at a later date .

Ok thank you gumbedamit I have 1Terabyte of Flac files on my Solid state 

drive  how could I access this to play ,and how can I pick out the music i want to play if say my ptovider Spectrum is down ?  
how can I choose ,access of the music ?

I am used to pick everything on my iPad .if I bought say a Innuous with a hard drive 

and streaming can I then maybe do this easier then my purpose built , computer ?

thanks all for the assistance 🙏👍

Ok thank you, I willlwork on getting a dedicated server streamer, for only one area 

is all I need.

Thank you ,it is as good as innuos they have a $2terabyte server,streamer in their mini is that any good ? I want something I can keep for awhile 

they have more expensive models also,   Please advise ,Thank you.