Siemens SIMATIC HMI Unified Comfort MTP700 Operating Instructions Manual page 73

Procedure
Note
Only use SIMATIC SD memory card ≥ 32 GB as system memory card
Only the SIMATIC SD memory card ≥ 32 GB is permitted for use as a system memory card.
All other memory cards are not recognized as system memory card by the HMI device.
The following procedure describes the replacement of the system memory card as an
example and applies in the same way to the data memory card.
1. Slide the safety catch to the desired position to replace the memory card.
2. To remove the memory card, briefly press-in the corresponding card.
The card is released and can be removed.
3. Insert the new memory card so that it clicks into place audibly and tangibly.
4. Slide the safety catch back into its original position.
If you have inserted the system memory card, the "System memory card plugged" dialog box
is displayed. This dialog box is used to open the Control Panel and enable the "Automatic
backup" function there.
Unified Comfort Panels
Operating Instructions, 03/2020, A5E46641217-AA
Operating the device
4.7 Memory concept and memory cards
73