ZX Spectrum – more storage options

Following on from my post from 2019, I’ve compiled a few more interesting modern data storage / retrieval solutions for the ZX Spectrum

Emulating old computer cassette tapes
https://github.com/evolutional/TZX-Cassette-Mod
https://www.hackster.io/news/build-a-tzxduino-reloaded-to-load-games-on-your-vintage-computer-f877085cd485
https://github.com/arananet/TzxDuino-Reloaded
https://github.com/rcmolina/MaxDuino_v1.67
http://projectavr.com/TZXDuino/
https://www.projectavr.com/old-skool-tape-loading/
https://github.com/tebl/8BIT-Wave
https://github.com/rickyelqasem/TZX_Tools
https://github.com/rickyelqasem/TZXDuino-Uploader

ZX Spectrum
https://github.com/alvaroalea/DandanatorAMIE
http://www.dandare.es/Proyectos_Dandare/Proyectos.html
https://github.com/mad3001/Multiply

Cartridges
https://en.wikipedia.org/wiki/ZX_Interface_2
http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_Custom.htm
https://github.com/mosaicmap/ZXS_I2_kartridz
http://trastero.speccy.org/cosas/droy/cartuchos/cartuchos_s.htm
https://github.com/tebl/ZX-Interface-2.021