Just ignore this comment if you find it irrelevant, but I wonder whether other options would be (more) suitable for the use case you sketch. Like a PicoTech ADC-20 logger (20 bit) or ADC-24 (24 bit), and/or a TC-08 Data Logger (specifically designed for thermocouples, but has voltage input option as well). You can run those from a PC but also from, say, a Raspberry Pi, which might solve the need for in-between computer backup during your measurements (and the associated interruptions in measuring). And there is cloud support, too. Whether this is an option also depends on your signals, and whether you can pre-condition them for use with such a logger (if you intend to measure 600VAC then the story is different than for a DC range of -1 to 1 V ;-).