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Tangara is a portable, open-source music player based on an ESP32 MCU

https://www.cnx-software.com/2024/02/06/tangara-portable-open-source-esp32-music-player/

Tangara is a portable music player that is out to make MP3 players cool again. With an iPod-inspired design and an ESP32 module at its core, Tangara

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Not all smartphones have the storage to store 2TB of songs. Phones with micro SD cards are rare as platinum these days.

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Lots of chinese phones still have an SD card slot, although its usually in the same location as the second SIM card, so you have to choose.

My phone is like this and I use the dual SIM feature, as the internal memory is 256gb anyway.