Anyone who frequently needs to transfer large amounts of data will benefit from the extra speed of the SanDisk Extreme Pro USB4 - but will also pay around twice as much as for a conventional external SSD model with USB3. About the memory cards: The Extreme Pro is worthwhile for action photography with long series and for video professionals who want to film at very high data rates...

The SDXC Pro Silver Series UHS-I 1066X256 GB V30 from Sandisk is considerably cheaper than the high-end card from Lexar. At 52 euros, the card costs less than a fifth of the price of the Lexar model. In terms of performance, the Sandisk can't quite keep up with the professional card, but it still delivers more than decent values...

Bad memory cards are rare these days, but there are still differences: among the microSD cards, the Kingston Canvas Go! Plus microSD 256 GB (39 euros) and the Emtec Gaming microSD 512 GB (68 euros) came out on top. The SD cards were won by the Kingston Canvas Go! Plus SD 256 GB (39 euros) and the Emtec Speedin Pro SD 512 GB (110 euros)...