Welcome to the forums and thanks for your post and apologies to hear your TiVo® is running slow.
The first thing to try is giving it a reboot to see if this helps. Also, go through your recorded content and remove anything that you no longer want on there. Has this made any difference?
Finally, try this key sequence: Home > Thumbs down > Thumbs up > Play > Play > Play. You'll hear a 'ping' noise and the screen will go blank. When the screen comes back on you should notice the TiVo® speed up!
The TiVo® stores data that it uses fairly often in the cache so it can be called upon quickly. This sequence clears the cache and by doing this you remove all the background data freeing up some of the TiVo®'s memory.
Give these actions a try and come back and let us know how things go as we're here to help
Kath_F Forum Team
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Wait!! A full reset will wipe everything and the benefit of doing so will only be temporary. There are a couple of less drastic procedures which 'work', as a temporary workaround, which will need repeating probably weekly. These will not lose your series links or your recordings. There is a sticky thread at the top of this forum which has one which other users have tried with a modicum of success. Worth a try before you take drastic action which will also need repeating : (