7 - 8 TC75 Integrator Guide
Figure 7-4 System Recovery Screen
7. Press the Volume Up and Volume Down buttons to navigate to apply from External SD card or apply from
Internal SD card.
8. Press the PTT button.
9. Use the Volume Up and Volume Down buttons to navigate to the System Update zip file.
10. Press the PTT button. The System Update installs and then the TC75 resets.
Storage
The device contains four types of file storage:
• Random Access Memory (RAM)
• External storage (microSD card)
• Internal storage
• Enterprise folder.
Random Access Memory
Executing programs use RAM to store data. Data stored in RAM is lost upon a reset.
The operating system manages how applications use RAM. It only allows applications and component processes
and services to use RAM when required. It may cache recently used processes in RAM, so they restart more
quickly when opened again, but it will erase the cache if it needs the RAM for new activities.
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