How do I download all of my music onto my iPhone?

So I've been an android user for over 5 years ish now and I've bought music over the years and I've made the switch to iPhone. I've downloaded all of my music onto my iTunes account on my computer and I was able to access it from my iPhone through iCloud. However I want it downloaded onto my phone so that I don't have to be connected to Wi-Fi or data if I want to listen to music out and about. The only way I can see that I can download the songs onto my iPhone is to manually download each song one by one, which would be unreasonable since I have over 2k songs transferred over. Is there an easier way?

Added (1). And the music was purchased through Google Play if you were curious, not that it makes a difference lol

Added (2). Never mind I figured out a trick

I download all of my music onto my iPhone

Plug your phone into the computer. Use the SYNC feature. You can determine what to move from there. But future syncs may remove older ones, to make room. I do not use it automatically, but sync by subcategory. Might take a few tries to get what you want - and Is notorious not keeping things in order.

Dropbox may be worth a look.

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