diff --git a/aopy/data/base.py b/aopy/data/base.py
index 61497a6e..5c87677d 100644
--- a/aopy/data/base.py
+++ b/aopy/data/base.py
@@ -14,6 +14,7 @@
 import warnings
 import yaml
 import pandas as pd
+import datetime
 
 # importlib_resources is a backport of importlib.resources from Python 3.9
 if sys.version_info >= (3,9):
@@ -49,6 +50,67 @@ def get_filenames_in_dir(base_dir, te):
         files[system] = filename
     return files
 
+def get_te_number(file_name):
+    '''
+    Extracts TE number from a file name.
+
+    Args:
+        file_names (str): a single file names
+
+    Returns:
+        int: TE number
+        
+    '''    
+    return int(file_name.split('_te')[1].split('.')[0])
+
+def load_raw_hdf(data_dir, prefix, start_date_str):
+    ''' 
+    Retrieves files in a specified directory that share a common prefix (usually the
+    name of the subject) and have been created since a specified start date. The files
+    are then arranged based on their TE number, and the number of days between each
+    consecutive file is calculated.
+    
+    Args:
+        data_dir (str): directory where the files will be
+        prefix (str): prefix of files to extract, usually the name of the monkey
+                      subject (i.e.: chur, beig, etc.)
+        start_date_str (str): start date of files to extract, formmatted as
+                              YYYMMDD
+
+    Returns:
+        pd dataframe: dataframe of file information, including file names and days
+        since previous file
+        list: a list of sorted file names in the provided directory
+    '''
+    file_names = [f for f in os.listdir(data_dir) if f.startswith(prefix+'20')]
+
+    file_names_filtered = []
+    for name in file_names:
+        date_str = name.split('_')[0].replace(prefix, '')
+        if date_str >= start_date_str:
+            file_names_filtered.append(name)
+
+    file_names_sorted = sorted(file_names_filtered, key=get_te_number)
+    
+    print(f'{(len(file_names_sorted))} files parsed.')
+
+    dates = [name.split('_')[0].replace(prefix, '') for name in file_names_sorted]
+    dates = [datetime.strptime(d, '%Y%m%d').date() for d in dates]
+    prev_date = None
+    deltas = []
+
+    for date in dates:
+        if prev_date:
+            delta = (date - prev_date).days
+        else:
+            delta = 0
+        deltas.append(delta)
+        prev_date = date
+
+    df = pd.DataFrame({'File Name': file_names_sorted, 'Days Since Prev': deltas})
+ 
+    return df, file_names_sorted
+
 def get_preprocessed_filename(subject, te_id, date, data_source):
     '''
     Generates preprocessed filenames as per our naming conventions. 
diff --git a/aopy/preproc/bmi3d.py b/aopy/preproc/bmi3d.py
index d77257ee..822fe05c 100644
--- a/aopy/preproc/bmi3d.py
+++ b/aopy/preproc/bmi3d.py
@@ -723,4 +723,46 @@ def get_target_events(exp_data, exp_metadata):
         event_target = target_location[None,:] * target_on[:,None]    
         target_events.append(event_target)
         
-    return np.array(target_events).transpose(1,0,2)
\ No newline at end of file
+    return np.array(target_events).transpose(1,0,2)
+
+def segment(start_events, end_events, data):
+    '''
+    Processes BMI3D events data and retrieves segments of events and corresponding timestamps
+    based on specified start and end events.
+    
+    This function is similar to get_trial_segments_and_times(), except that it is more
+    specialized to work with BMI3D events. 
+    
+    Args:
+        start_events (list): list of start events to identify the beginning of each segment
+        end_events (list): list of end events to mark the end of each segment
+        data (dict): dictionary of BMI3D events data with keys 'bmi3d_events', 'code', and 'time'.
+        
+    Returns:
+        tuple: A tuple containing:
+            | **segments (list of lists of events):** A list of segments, each represented as a list of events.
+            | **segment_times (list of lists of times):** A list of corresponding timestamps for each event in the segments.    
+    '''
+    bmi3d_events = data['bmi3d_events']
+
+    event_code = bmi3d_events['code']
+    event_inds = bmi3d_events['time']
+    
+    evt_start_idx = np.where(np.in1d(event_code, start_events))[0]
+
+    segments = []
+    segment_times = []
+    for idx_evt in range(len(evt_start_idx)):
+        idx_start = evt_start_idx[idx_evt]
+        idx_end = evt_start_idx[idx_evt] + 1
+
+        while idx_end < len(event_code):
+            if np.in1d(event_code[idx_end], start_events):
+                break
+            if np.in1d(event_code[idx_end], end_events):
+                segments.append(event_code[idx_start:idx_end+1])
+                segment_times.append(event_inds[idx_start:idx_end+1])
+                break
+            idx_end += 1
+            
+    return segments, segment_times
diff --git a/aopy/utils/tablet.py b/aopy/utils/tablet.py
new file mode 100644
index 00000000..8c5ed5bb
--- /dev/null
+++ b/aopy/utils/tablet.py
@@ -0,0 +1,70 @@
+import numpy as np
+import re
+import aopy
+from aopy.preproc.bmi3d import segment
+
+TRIAL_START = 2
+REWARD = 48
+
+def build_file_df(df, file_names_sorted, data_dir, traj = True):
+    '''
+    Builds a dataframe from given files with metadata (runtime, reward trial length,
+    trajectory amplitude). Reports problematic files.
+    
+    Args:
+        df (pd dataframe): dataframe with a row for each file to process
+        file_names_sorted (list): list of file names, sorted by TE number
+        data_dir (str): directory where files are found
+        traj (bool): whether to include trajectory amplitude as a column
+    
+    Returns:
+        pd dataframe: dataframe with processed metadata information for each given
+        file, where each row is one file
+    '''
+
+    time2 = 5
+    problem_flag = False
+    
+    print('Building dataset...')
+    
+    for i, f in enumerate(file_names_sorted):
+        files = dict(hdf=f)
+        data, metadata = aopy.preproc.bmi3d._parse_bmi3d_v1(data_dir, files)
+        bmi3d_task = data['bmi3d_task']
+        
+        pattern = r'"runtime":\s*([0-9.]+)'
+
+        try:
+            match = re.search(pattern, metadata['report'])
+            runtime = round(float(match.group(1)))
+
+        except:
+            if not problem_flag:
+                print('Problematic files: \n')
+                problem_flag = True
+            print(f)
+            continue
+        
+        df.loc[i, 'Runtime'] = runtime
+        
+        if traj:
+            try:
+                df.loc[i, 'Trajectory Amplitude'] = np.ceil(max(abs(min(bmi3d_task['current_target'][:, 2])), 
+                                                                abs(max(bmi3d_task['current_target'][:, 2]))))
+            except:
+                if not problem_flag:
+                    print('Problematic files: \n')
+                    problem_flag = True
+                print(f)
+                continue
+            
+        # trial length
+        rewarded = segment([TRIAL_START], [REWARD], data)[1]
+        time = []
+        for j in (rewarded):
+            time.append(j[-1] - j[0])
+            time2 = round((np.median(time))/metadata['fps'])
+    
+        df.loc[i, 'Reward trial length'] = time2
+    return df
+
diff --git a/tests/data/sample_hdfs/beig20210407_01_te1315.hdf b/tests/data/sample_hdfs/beig20210407_01_te1315.hdf
new file mode 100644
index 00000000..80531d72
Binary files /dev/null and b/tests/data/sample_hdfs/beig20210407_01_te1315.hdf differ
diff --git a/tests/data/sample_hdfs/beig20210614_07_te1825.hdf b/tests/data/sample_hdfs/beig20210614_07_te1825.hdf
new file mode 100644
index 00000000..aba672e9
Binary files /dev/null and b/tests/data/sample_hdfs/beig20210614_07_te1825.hdf differ
diff --git a/tests/data/sample_hdfs/beig20210929_02_te2949.hdf b/tests/data/sample_hdfs/beig20210929_02_te2949.hdf
new file mode 100644
index 00000000..a23663f5
Binary files /dev/null and b/tests/data/sample_hdfs/beig20210929_02_te2949.hdf differ
diff --git a/tests/data/sample_hdfs/beig20210930_02_te2952.hdf b/tests/data/sample_hdfs/beig20210930_02_te2952.hdf
new file mode 100644
index 00000000..c861d555
Binary files /dev/null and b/tests/data/sample_hdfs/beig20210930_02_te2952.hdf differ
diff --git a/tests/data/sample_hdfs/beig20221002_09_te6890.hdf b/tests/data/sample_hdfs/beig20221002_09_te6890.hdf
new file mode 100644
index 00000000..b4f68cc8
Binary files /dev/null and b/tests/data/sample_hdfs/beig20221002_09_te6890.hdf differ
diff --git a/tests/data/sample_hdfs/beig20230109_15_te7977.hdf b/tests/data/sample_hdfs/beig20230109_15_te7977.hdf
new file mode 100644
index 00000000..3e9eb62b
Binary files /dev/null and b/tests/data/sample_hdfs/beig20230109_15_te7977.hdf differ
diff --git a/tests/data/sample_hdfs/chur20231002_02_te375.hdf b/tests/data/sample_hdfs/chur20231002_02_te375.hdf
new file mode 100644
index 00000000..dd9c53df
Binary files /dev/null and b/tests/data/sample_hdfs/chur20231002_02_te375.hdf differ
diff --git a/tests/test_data.py b/tests/test_data.py
index f06a0908..939066b9 100644
--- a/tests/test_data.py
+++ b/tests/test_data.py
@@ -292,6 +292,20 @@ def test_chanel_bank_name(self):
         self.assertEqual(ch_name, 'bottom')
                 
 class HDFTests(unittest.TestCase):
+    
+    def test_get_te_number(self):
+        file_names = ['chur20231002_02_te375','beig20230109_15_te7977.hdf', 'beig20221002_09_te6890.hdf']
+        te_ids = [375, 7977, 6890]
+        result = [get_te_number(file_name) for file_name in file_names]
+        self.assertEqual(result, te_ids)
+    
+    def test_load_raw_hdf(self):
+        hdf_dir = 'data/sample_hdfs'
+        os.path.join(data_dir, hdf_dir)
+        df, sorted_file_names = load_raw_hdf(hdf_dir, 'beig', '20220101')
+        correct_file_names = ['beig20221002_09_te6890.hdf', 'beig20230109_15_te7977.hdf']
+        self.assertEqual(sorted_file_names, correct_file_names)
+        self.assertEqual(list(df['Days Since Prev']), [0, 99])
 
     def test_save_hdf(self):
         import os