Brand new USB memory sticks tested with a triple scan, guaranteed to hold the full capacity with no corruptions or lost data.

These are formatted with FAT/FAT32/exFAT (depending on size), and are therefore immediately compatible with PC/Mac/anything with a standard USB port without any reformatting or special utilities.  You can of course change the formatting, or ask me to do so before sending.

For phones, or a computer with the new small USB C port, also purchase a Micro USB or USB C adapter, which will also allow you to connect a keyboard or mouse to your phone etc.