Phones are great for listening, but a computer is much better for building a music collection. A large screen makes it easy to search, convert, rename, and sort files before they end up on a device. Here is a workflow that stays tidy.
Why use a computer
Typing is faster, downloads are more reliable on a wired or strong Wi-Fi connection, and you can organise dozens of files in a couple of minutes with a keyboard. It is also easier to spot when a result does not match what you meant to save.
Where files go on desktop
Your browser saves downloads to a single folder, usually called Downloads in your home directory. On Windows that is under your user folder; on macOS it is in the Finder sidebar. Everything you convert lands there until you move it.
Rename as you go
Before moving a file, give it a useful name such as Artist - Title.mp3 (the same idea behind MP3 tags and metadata). Sorting by artist later is far easier when the name already says who it is. A handful of seconds now saves minutes of digging later.
Back up your collection
A music folder that lives only on one computer is one failure away from disappearing. Copy your library to an external drive or a cloud folder on a regular schedule, and you will never have to rebuild it from scratch.
Move files to your phone
When the library is neat (see how to organise an MP3 library), copy the folder to your phone over USB or a transfer app. Because the files are already named and sorted, they will appear in a sensible order on the device, ready to play.
